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<DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>UNITED
STATES</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><STRONG>SECURITIES
AND EXCHANGE COMMISSION</STRONG></FONT><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Washington,
D.C. 20549</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman"><STRONG>Form
8-K</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman"><STRONG>Current
Report</STRONG></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><STRONG>&nbsp;</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of
1934</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date of
Report</FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>&nbsp;</STRONG></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Date of
earliest event reported):</FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>
May 23, 2005</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman"><STRONG>RITA
Medical Systems, Inc.</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Exact
name of registrant as specified in its charter)</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>000-30959</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Commission
File Number)</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
  <TR>
    <TD vAlign=top align=middle width="40%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>California</STRONG></FONT></DIV></TD>
    <TD vAlign=top align=middle width="40%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>94-3199149</STRONG></FONT></DIV></TD></TR>
  <TR>
    <TD vAlign=top align=middle width="40%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(State
      or other jurisdiction of</FONT></DIV></TD>
    <TD vAlign=top align=middle width="40%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(I.R.S.
      Employer Identification No.)</FONT></DIV></TD></TR>
  <TR>
    <TD vAlign=top align=middle width="40%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">incorporation)</FONT></DIV></TD>
    <TD vAlign=top align=left width="40%">&nbsp;</TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>46421
Landing Parkway</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Fremont,
CA 94538</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Address
of principal executive offices, with zip code)</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>(510)
771-0400</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant's
telephone number, including area code)</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Check the
appropriate box below if the Form 8-K filing is intended to simultaneously
satisfy the filing obligation of the registrant under any of the following
provisions (</FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><EM>see</EM></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"> General
Instruction A.2. below):</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=justify>&nbsp;</DIV>
<DIV>
<TABLE id=hangingindent cellSpacing=0 cellPadding=0 width="100%" align=center
border=0>
  <TR style="LINE-HEIGHT: 1.25" vAlign=top>
    <TD style="WIDTH: 18pt"></TD>
    <TD style="WIDTH: 18pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      face=Wingdings>o</FONT></DIV></TD>
    <TD>
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)</FONT></DIV></TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=justify>&nbsp;</DIV>
<DIV>
<TABLE id=hangingindent cellSpacing=0 cellPadding=0 width="100%" align=center
border=0>
  <TR style="LINE-HEIGHT: 1.25" vAlign=top>
    <TD style="WIDTH: 18pt">&nbsp;</TD>
    <TD style="WIDTH: 18pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      face=Wingdings>o</FONT></DIV></DIV></TD>
    <TD>
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)</FONT></DIV></TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=justify>&nbsp;</DIV>
<DIV>
<TABLE id=hangingindent cellSpacing=0 cellPadding=0 width="100%" align=center
border=0>
  <TR style="LINE-HEIGHT: 1.25" vAlign=top>
    <TD style="WIDTH: 18pt">&nbsp;</TD>
    <TD style="WIDTH: 18pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      face=Wingdings>o</FONT></DIV></DIV></TD>
    <TD>
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))</FONT></DIV></TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=justify>&nbsp;</DIV>
<DIV>
<TABLE id=hangingindent cellSpacing=0 cellPadding=0 width="100%" align=center
border=0>
  <TR style="LINE-HEIGHT: 1.25" vAlign=top>
    <TD style="WIDTH: 18pt">&nbsp;</TD>
    <TD style="WIDTH: 18pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      face=Wingdings>o</FONT></DIV></DIV></TD>
    <TD>
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))</FONT></DIV></TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=justify>&nbsp;</DIV><BR>
<DIV id=PGBRK style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=FTR>
<DIV id=GLFTR style="WIDTH: 100%" align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV id=PN style="PAGE-BREAK-AFTER: always">
<DIV style="WIDTH: 100%; TEXT-ALIGN: center"><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt" face="Times New Roman"></FONT></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center">
<HR color=#000000 noShade SIZE=2>
</DIV></DIV>
<DIV id=HDR>
<DIV id=GLHDR style="WIDTH: 100%" align=right><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV></DIV><BR>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Item
4.01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</STRONG></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Changes
in Registrant's Certifying Accountant.</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On May
23, 2005, RITA Medical Systems, Inc. (the "Company") received notice from
PricewaterhouseCoopers LLP ("PwC") that PwC was resigning as the Company's
independent registered public accounting firm, effective immediately. The
Company had engaged PricewaterhouseCoopers LLP as its independent registered
public accounting firm in 1994. The Audit Committee of the Company neither
recommended nor approved the resignation of the Company's independent registered
public accounting firm. The Audit Committee of the Company has begun the process
of identifying and selecting a new independent registered public accounting firm
to audit the Company's consolidated financial statements for the year ending
December 31, 2005. The Company has authorized PwC to respond fully to successor
auditor inquiries.</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
reports of PwC on the Company's financial statements for the years ended
December 31, 2004 and December 31, 2003 did not contain an adverse opinion or
disclaimer of opinion, and were not qualified or modified as to uncertainty,
audit scope or accounting principle. </FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">During
the years ended December 31, 2004 and December 31, 2003 and through May 23,
2005, there were no disagreements with PwC on any matter of accounting
principles or practices, financial statement disclosure or auditing scope or
procedure that, if not resolved to the satisfaction of PwC, would have caused
PwC to make reference thereto in its reports on the financial statements for
such years.</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">During
the years ended December 31, 2004 and December 31, 2003 and through May 23,
2005, there have been no reportable events, as defined in Item 304(a)(1)(v) of
Regulation S-K, except as noted below:</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Company disclosed in its Form 10-K/A for the fiscal year ended December 31,
2004, that in evaluating its internal control over financial reporting,
management considered certain items control deficiencies that constituted a
material weakness. The following weaknesses were included in management's
assessment:</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>&nbsp;</DIV>
<DIV align=center>
<TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#ffffff>
  <TR bgColor=#ffffff>
    <TD width="5%">&nbsp;</TD>
    <TD vAlign=top width="5%">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(i)</FONT></DIV></TD>
    <TD width="90%">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">As
      of December 31, 2004, RITA Medical Systems, Inc. did not maintain
      effective controls over the reconciliation of accrued expenses and certain
      cash accounts. Specifically, the Company failed to reconcile the
      supporting documentation for certain material expense accruals, foreign
      cash accounts and the primary operating cash account to the general
      ledger, impacting Rita Medical Systems&#8217; ability to ensure all transactions
      flowing through the accounts are properly reflected in the recorded
      account balances. This control deficiency resulted in audit adjustments to
      accrued liabilities, general operating expenses and cash in the Company&#8217;s
      2004 annual consolidated financial statements. Additionally, this control
      deficiency could result in a misstatement of accrued liabilities, general
      operating expenses and cash that would result in a material misstatement
      to the annual or interim financial statements that would not be prevented
      or detected. Accordingly, management has determined that this control
      deficiency constitutes a material weakness.</FONT></DIV></TD></TR></TABLE></DIV>
<DIV>
<DIV>
<TABLE id=hangingindent cellSpacing=0 cellPadding=0 width="100%" align=center
border=0></TABLE></DIV>
<DIV>&nbsp;</DIV></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>&nbsp;</DIV>
<DIV id=PGBRK style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=FTR>
<DIV id=GLFTR style="WIDTH: 100%" align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV id=PN style="PAGE-BREAK-AFTER: always">
<DIV style="WIDTH: 100%; TEXT-ALIGN: center"><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt" face="Times New Roman">-2-</FONT></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center">
<HR color=#000000 noShade SIZE=2>
</DIV></DIV>
<DIV id=HDR>
<DIV id=GLHDR style="WIDTH: 100%" align=right><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>&nbsp;</DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>
<TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#ffffff>
  <TR bgColor=#ffffff>
    <TD width="5%"></TD>
    <TD vAlign=top width="5%">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(ii)</FONT></DIV></FONT></DIV></TD>
    <TD width="90%">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <DIV style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">As
      of December 31, 2004, RITA Medical Systems, Inc. did not maintain
      effective controls over the completeness and accuracy of accounts payable.
      Specifically, the Company failed to identify and record, at year end,
      certain operating expenses including franchise taxes and general corporate
      expenses. This control deficiency resulted in audit adjustments to
      accounts payable and the related operating expenses in the Company&#8217;s 2004
      annual consolidated financial statements. Additionally, this control
      deficiency could result in a misstatement of accounts payable and
      operating expenses that would result in a material misstatement to the
      annual or interim financial statements that would not be prevented or
      detected. Accordingly, management has determined that this control
      deficiency constitutes a material
weakness.</FONT></DIV></DIV></TD></TR></TABLE></DIV>
<DIV>&nbsp;</DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Because
of these material weaknesses, management concluded that the Company did not
maintain effective internal control over financial reporting as of December 31,
2004, based on the criteria described in </FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><EM>Internal
Control-Integrated Framework</EM></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"> issued
by the Committee of Sponsoring Organizations of the Treadway Commission. These
control deficiencies and the material weaknesses, and the Company's efforts to
remediate them, are described in Item 9A of the Company's Form 10-K/A for the
year ended December 31, 2004, as filed with the Securities and Exchange
Commission (the "SEC") on May 2, 2005 and the Company's Form 10-Q for the
quarter ended March 31, 2005, as filed with the SEC on May 10,
2005.</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>&nbsp;</DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Company has furnished a copy of the above disclosures and requested that PwC
furnish the Company with a letter addressed to the SEC stating whether or not it
agrees with the above disclosures. A copy of such letter is attached as Exhibit
16.1 to this Current Report on Form 8-K.</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Item
9.01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</STRONG></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>Financial
Statements and Exhibits.</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibits:</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">16.1</FONT><FONT
id=TAB2 style="COLOR: black; LETTER-SPACING: 27pt">&nbsp;</FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Letter
from PricewaterhouseCoopers LLP to the Securities and Exchange Commission dated
May 27, 2005</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV><BR>
<DIV id=PGBRK style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=FTR>
<DIV id=GLFTR style="WIDTH: 100%" align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV id=PN style="PAGE-BREAK-AFTER: always">
<DIV style="WIDTH: 100%; TEXT-ALIGN: center"><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt" face="Times New Roman">-3-</FONT></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center">
<HR color=#000000 noShade SIZE=2>
</DIV></DIV>
<DIV id=HDR>
<DIV id=GLHDR style="WIDTH: 100%" align=right><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV></DIV><BR>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>SIGNATURES</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center>&nbsp;</DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><FONT id=TAB1 style="MARGIN-LEFT: 36pt"></FONT><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant has
duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized.</FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left>
<TABLE cellSpacing=0 cellPadding=0 width="100%" align=center bgColor=#ffffff
border=0>
  <TR vAlign=top bgColor=#ffffff>
    <TD width="50%"><FONT size=2>&nbsp;</FONT></TD>
    <TD width="1%"><FONT size=2>&nbsp;</FONT></TD>
    <TD width="49%"><FONT size=2>&nbsp;</FONT></TD></TR>
  <TR vAlign=top bgColor=#ffffff>
    <TD><FONT size=2>&nbsp;</FONT></TD>
    <TD colSpan=2><FONT size=2><STRONG>RITA MEDICAL SYSTEMS,
      INC.</STRONG></FONT></TD></TR>
  <TR vAlign=top bgColor=#ffffff>
    <TD><FONT size=2>&nbsp;<BR>&nbsp;</FONT></TD>
    <TD><FONT size=2>&nbsp;<BR>&nbsp;</FONT></TD>
    <TD><FONT size=2>&nbsp;<BR>&nbsp;</FONT></TD></TR>
  <TR vAlign=top bgColor=#ffffff>
    <TD><FONT size=2>Date:&nbsp;May 27, 2005</FONT></TD>
    <TD><FONT size=2>By:&nbsp;&nbsp;</FONT></TD>
    <TD><FONT size=2>/s/&nbsp;Joseph DeVivo</FONT></TD></TR>
  <TR vAlign=top bgColor=#ffffff>
    <TD colSpan=2><FONT size=1>&nbsp;</FONT></TD>
    <TD align=left>
      <HR align=left width="80%" color=#000000 noShade SIZE=2>
    </TD></TR>
  <TR vAlign=top bgColor=#ffffff>
    <TD colSpan=2><FONT size=2>&nbsp;</FONT></TD>
    <TD>
      <DIV><FONT size=2>Joseph DeVivo</FONT></DIV>
      <DIV><FONT size=2>President and Chief Executive
Officer</FONT></DIV></TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV><BR>
<DIV id=PGBRK style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=FTR>
<DIV id=GLFTR style="WIDTH: 100%" align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV id=PN style="PAGE-BREAK-AFTER: always">
<DIV style="WIDTH: 100%; TEXT-ALIGN: center"><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt" face="Times New Roman">-4-</FONT></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center">
<HR color=#000000 noShade SIZE=2>
</DIV></DIV>
<DIV id=HDR>
<DIV id=GLHDR style="WIDTH: 100%" align=right><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV></DIV><BR>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>RITA
MEDICAL SYSTEMS, INC.</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><FONT
style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><STRONG>INDEX
TO EXHIBITS</STRONG></FONT></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=center><BR></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
  <TR>
    <TD style="BORDER-BOTTOM: black thin solid" vAlign=top align=middle
    width="15%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibit
      Number</FONT></DIV></TD>
    <TD style="BORDER-BOTTOM: black thin solid" vAlign=top align=middle
    width="66%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Description</FONT></DIV></TD>
    <TD vAlign=top align=middle width="4%">&nbsp;</TD></TR>
  <TR>
    <TD vAlign=top align=left width="15%"><FONT
      style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: Times New Roman"></FONT></TD>
    <TD vAlign=top align=left width="66%"><FONT
      style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></TD>
    <TD vAlign=top align=left width="4%"><FONT
      style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></TD></TR>
  <TR bgColor=#ccffcc>
    <TD vAlign=top align=middle width="15%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=center><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">16.1</FONT></DIV></TD>
    <TD vAlign=top align=left width="66%">
      <DIV
      style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
      align=left><FONT
      style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Letter
      from PricewaterhouseCoopers LLP to the Securities and Exchange Commission
      dated May 27, 2005</FONT></DIV></TD>
    <TD vAlign=top align=middle width="4%">&nbsp;</TD></TR></TABLE></DIV>
<DIV
style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"
align=left><BR></DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV id=PGBRK style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=FTR>
<DIV id=GLFTR style="WIDTH: 100%" align=left><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center"><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt" face="Times New Roman">-5-</FONT></DIV>
<DIV style="WIDTH: 100%; TEXT-ALIGN: center">
<HR color=#000000 noShade SIZE=2>
</DIV></DIV>
<DIV id=HDR>
<DIV id=GLHDR style="WIDTH: 100%" align=right><FONT
style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman"></FONT></DIV></DIV></DIV>
<DIV></DIV></BODY></HTML>
{"company-data": {"conformed-name": "RITA MEDICAL SYSTEMS INC", "cik": "0001056421", "assigned-sic": "3845", "irs-number": "943199149", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-30959", "film-number": "05863366"}, "business-address": {"street1": "967 N SHORELINE BLVD", "city": "MOUNTAIN VIEW", "state": "CA", "zip": "94013", "phone": "6503858500"}, "mail-address": {"street1": "967 NORTH SHORELINE BLVD", "city": "MOUNTAIN VIEW", "state": "CA", "zip": "94043"}}
Unassociated Document
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
Washington,
D.C. 20549
Form
8-K
Current
Report
Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of
1934
Date of
Report
(Date of
earliest event reported):
May 23, 2005
RITA
Medical Systems, Inc.
(Exact
name of registrant as specified in its charter)
000-30959
(Commission
File Number)
California
94-3199149
(State
      or other jurisdiction of
(I.R.S.
      Employer Identification No.)
incorporation)
46421
Landing Parkway
Fremont,
CA 94538
(Address
of principal executive offices, with zip code)
(510)
771-0400
(Registrant's
telephone number, including area code)
Check the
appropriate box below if the Form 8-K filing is intended to simultaneously
satisfy the filing obligation of the registrant under any of the following
provisions (
see
General
Instruction A.2. below):
o
Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
o
Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)
o
Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))
o
Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))
Item
4.01
Changes
in Registrant's Certifying Accountant.
On May
23, 2005, RITA Medical Systems, Inc. (the "Company") received notice from
PricewaterhouseCoopers LLP ("PwC") that PwC was resigning as the Company's
independent registered public accounting firm, effective immediately. The
Company had engaged PricewaterhouseCoopers LLP as its independent registered
public accounting firm in 1994. The Audit Committee of the Company neither
recommended nor approved the resignation of the Company's independent registered
public accounting firm. The Audit Committee of the Company has begun the process
of identifying and selecting a new independent registered public accounting firm
to audit the Company's consolidated financial statements for the year ending
December 31, 2005. The Company has authorized PwC to respond fully to successor
auditor inquiries.
The
reports of PwC on the Company's financial statements for the years ended
December 31, 2004 and December 31, 2003 did not contain an adverse opinion or
disclaimer of opinion, and were not qualified or modified as to uncertainty,
audit scope or accounting principle.
During
the years ended December 31, 2004 and December 31, 2003 and through May 23,
2005, there were no disagreements with PwC on any matter of accounting
principles or practices, financial statement disclosure or auditing scope or
procedure that, if not resolved to the satisfaction of PwC, would have caused
PwC to make reference thereto in its reports on the financial statements for
such years.
During
the years ended December 31, 2004 and December 31, 2003 and through May 23,
2005, there have been no reportable events, as defined in Item 304(a)(1)(v) of
Regulation S-K, except as noted below:
The
Company disclosed in its Form 10-K/A for the fiscal year ended December 31,
2004, that in evaluating its internal control over financial reporting,
management considered certain items control deficiencies that constituted a
material weakness. The following weaknesses were included in management's
assessment:
(i)
As
      of December 31, 2004, RITA Medical Systems, Inc. did not maintain
      effective controls over the reconciliation of accrued expenses and certain
      cash accounts. Specifically, the Company failed to reconcile the
      supporting documentation for certain material expense accruals, foreign
      cash accounts and the primary operating cash account to the general
      ledger, impacting Rita Medical Systems' ability to ensure all transactions
      flowing through the accounts are properly reflected in the recorded
      account balances. This control deficiency resulted in audit adjustments to
      accrued liabilities, general operating expenses and cash in the Company's
      2004 annual consolidated financial statements. Additionally, this control
      deficiency could result in a misstatement of accrued liabilities, general
      operating expenses and cash that would result in a material misstatement
      to the annual or interim financial statements that would not be prevented
      or detected. Accordingly, management has determined that this control
      deficiency constitutes a material weakness.
-2-
(ii)
As
      of December 31, 2004, RITA Medical Systems, Inc. did not maintain
      effective controls over the completeness and accuracy of accounts payable.
      Specifically, the Company failed to identify and record, at year end,
      certain operating expenses including franchise taxes and general corporate
      expenses. This control deficiency resulted in audit adjustments to
      accounts payable and the related operating expenses in the Company's 2004
      annual consolidated financial statements. Additionally, this control
      deficiency could result in a misstatement of accounts payable and
      operating expenses that would result in a material misstatement to the
      annual or interim financial statements that would not be prevented or
      detected. Accordingly, management has determined that this control
      deficiency constitutes a material
weakness.
Because
of these material weaknesses, management concluded that the Company did not
maintain effective internal control over financial reporting as of December 31,
2004, based on the criteria described in
Internal
Control-Integrated Framework
issued
by the Committee of Sponsoring Organizations of the Treadway Commission. These
control deficiencies and the material weaknesses, and the Company's efforts to
remediate them, are described in Item 9A of the Company's Form 10-K/A for the
year ended December 31, 2004, as filed with the Securities and Exchange
Commission (the "SEC") on May 2, 2005 and the Company's Form 10-Q for the
quarter ended March 31, 2005, as filed with the SEC on May 10,
2005.
The
Company has furnished a copy of the above disclosures and requested that PwC
furnish the Company with a letter addressed to the SEC stating whether or not it
agrees with the above disclosures. A copy of such letter is attached as Exhibit
16.1 to this Current Report on Form 8-K.
Item
9.01
Financial
Statements and Exhibits.
(c)
Exhibits:
16.1
Letter
from PricewaterhouseCoopers LLP to the Securities and Exchange Commission dated
May 27, 2005
-3-
SIGNATURES
Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant has
duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized.
RITA MEDICAL SYSTEMS,
      INC.
Date: May 27, 2005
By:
/s/ Joseph DeVivo
Joseph DeVivo
President and Chief Executive
Officer
-4-
RITA
MEDICAL SYSTEMS, INC.
INDEX
TO EXHIBITS
Exhibit
      Number
Description
16.1
Letter
      from PricewaterhouseCoopers LLP to the Securities and Exchange Commission
      dated May 27, 2005
-5-