What is the term for a malignant tumor of epithelial tissue?

The correct term for a malignant tumor of epithelial tissue is carcinoma. Carcinomas originate from epithelial cells, which are the cells that line the surfaces of organs and structures throughout the body, including the skin, glands, and the lining of the gastrointestinal tract, among others. This type of cancer is characterized by uncontrolled growth and has the potential to invade other tissues and organs.

Carcinomas can be further categorized into different types based on the specific characteristics and the type of epithelial cell involved. Common types of carcinoma include squamous cell carcinoma, adenocarcinoma, and basal cell carcinoma.

In contrast, the other terms refer to different types of tumors or tissues: sarcoma refers to malignant tumors that arise from connective tissues such as bone, muscle, and fat; adenoma is a benign tumor of glandular tissue, which is not malignant; and fibroma refers to a benign tumor composed of fibrous connective tissue. These distinctions are critical in understanding the nature of tumors and their potential impact on health.