PURPOSE : Although the existence of cancer stem cells ( CSC ) in adenoid cystic carcinoma ( ACC ) has been proposed , lack of assays for their propagation and uncertainty about molecular markers prevented their characterization .
O O O O O O B-DiseaseOrPhenotypicFeature O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O O O O O O