Carcinoma 2016-02-27T09:36:36Z A malignant tumor arising from epithelial cells. Carcinomas that arise from glandular epithelium are called adenocarcinomas, those that arise from squamous epithelium are called squamous cell carcinomas, and those that arise from transitional epithelium are called transitional cell carcinomas (NCI Thesaurus). UMLS:C0007097 NCIT:C2916 SNOMEDCT_US:68453008 Epithelial neoplasm