Experimental Factor Ontology term EFO_1000243 (Epidermal Inclusion Cyst) (EIC), also known as sebaceous cyst and epidermoid cyst, is the most common cyst of the skin. It ranges in size from a few millimeters to a few centimeters and originates from the follicular infundibulum. Its contents are a cheesy, malodorous mixture of degraded lipid and keratin. It often ruptures, with associated pain and inflammation. (http://www.medicinenet.com/image-collection/epidermal_inclusion_cyst_eic_picture/picture.htm). Also known as: EIC, epidermoid cyst, sebaceous cyst.