Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** 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. Morphologically, the malignant epithelial cells may display abnormal mitotic figures, anaplasia, and necrosis. Carcinomas are graded by the degree of cellular differentiation as well, moderately, or poorly differentiated. Carcinomas invade the surrounding tissues and tend to metastasize to other anatomic sites. Lung carcinoma, skin carcinoma, breast carcinoma, colon carcinoma, and prostate carcinoma are the most frequently seen carcinomas.

**Synonyms:** - CARCINOMA, MALIGNANT - Carcinoma, NOS - Carcinoma, NOS - Epithelial Carcinoma - Epithelial Carcinoma - Epithelial tumor, malignant - Epithelioma Malignant - Malignant Epithelial Neoplasm - Malignant Epithelial Neoplasm - Malignant Epithelial Tumor - Malignant Epithelial Tumor - Malignant Epithelioma - Malignant Epithelioma - Other Carcinoma - carcinoma - epithelial carcinoma