What term describes a tumor of fat tissue?

The term that describes a tumor of fat tissue is lipoma. Lipomas are benign tumors composed of adipose (fat) tissue and are generally soft to the touch, movable, and usually painless. They can occur anywhere in the body where fat tissue is present and are often found just beneath the skin.

Liposarcoma, on the other hand, refers to a malignant tumor of fat tissue, which is a cancerous growth, differentiating it from the benign nature of a lipoma. Adenoma is a benign tumor that arises from glandular tissue and does not pertain to fat. Carcinoma refers to a category of cancers that arise from epithelial cells and typically does not refer to fat tissue specifically. Thus, the correct understanding of these terms demonstrates why lipoma is the appropriate answer for a tumor specifically associated with fat tissue.