[A tumor consisting of displaced ectodermal structures along the lines of embryonic fusion, the wall being formed of epithelium-lined connective tissue, including skin appendages, and containing keratin, sebum, and hair. (Stedman, 25th ed) ( MSH )]
UMLS (NCI) C0011649 Relation/PAR: cyst
Neoplasms, Germ Cell and Embryonal