Ear ceruminous adenoma.

Ceruminous adenoma, also called ceruminoma, ceruminal adenoma, apocrine adenoma, or even cylindroma in the past (the latter three terms are discouraged) is a benign glandular neoplasm of ceruminous glands (modified apocrine sweat glands) that arises solely from the external auditory canal. By definition, this tumor type cannot involve the auricular cartilages, ear lobe, or other such external ear apparatus.