definition
An eyelid mass that results from chronic inflammation of a meibomian gland and shows a granulomatous reaction to liberated fat when subject to histopathological examination. (Dorland, 27th ed)
UMLS
Chalazion, Chalazions, Cyst, meibomian, Cyst, meibomian gland, Cysts, Meibomian, Meibomian Cyst, Meibomian Cysts, Meibomian gland cyst, Meibomian, cyst, Tarsal cyst