Epidermoid cyst(Ear Cyst, in this Case)An epidermoid cyst is a benign cyst usually found on the skin. The cyst develops out of ectodermal tissue. Histologically, it is made of a thin layer of squamous epithelium.➡️Several synonyms exist for epidermoid cysts, including epidermal cyst, infundibular cyst, keratin cyst and the technically incorrect, epidermal inclusion cyst.