tips 03: 医学英语阅读：tumors of epithelial origin-欧洲杯下单平台

both benign and malignant tumors can arise from most types of epithelial cells. malignant tumors of epithelial origin are called carcinomas (gr. karkinos, cancer oma, tumor). malignant tumors derived from glandular epithelial tissue are called adenocarcinomas (gr. adenos, gland karkinos). adenocarcinomas are by far the most common tumors in adults after age 45.