Which of the following is a fatty tumor?

A fatty tumor is characterized by an abnormal proliferation of adipose (fat) tissue. The correct choice, which is lipoma, specifically refers to a benign tumor composed of fat cells. Lipomas are typically soft and movable under the skin and are often found on the torso, arms, and thighs. They are generally harmless and painless, making them a common form of soft tissue tumor.

In contrast, myoma refers to a tumor made up of muscular tissue, typically associated with the uterus, such as uterine fibroids. Angioma is a growth made up of blood vessels and can appear as a red or purple birthmark or vascular malformation. Fibroma is a tumor that consists primarily of fibrous connective tissue. Each of these types of tumors originates from different cell types, distinguishing them from lipomas, which are specifically composed of adipose tissue.