Epidermoid Cyst: A membranous sac or cavity of abnormal character, containing fluid that is present on the epidermis (uppermost layer) of the skin.

Fibromyalgia: A rheumatic condition characterized by muscular or musculoskeletal pain with stiffness.

Lipoma: A benign tumor of fatty tissue.

Polyp: An abnormal growth of tissue projecting from a mucous membrane and attached to the surface by a narrow elongated stalk.