Fig. 22. A. Dermoid cyst shows hair follicle (h) and hair shaft (arrows) in cyst lumen. B. Dermoid cyst has skin appendages in cyst wall (arrow), is lined by stratified squamous epithelium, and contains desquamated keratin in its lumen (L). There is a granulomatous inflammatory infiltrate (g) due to rupture of cyst. (From Yanoff M, Fine BS: Ocular Pathology, 3rd ed. Philadelphia, JB Lippincott, 1989, 186.)