Granular cell tumor (myoblastoma) of the palpebral conjunctiva causing pseudoepitheliomatous hyperplasia of the conjunctival epithelium.
Granular cell tumors rarely occur in the ocular adnexal structures and only three cases have been described in which the eyelid alone was involved. I examined a patient who was, I believe, the first in whom a granular cell tumor appeared clinically as a conjunctival lesion. She was also the first patient with a granular cell tumor of the ocular adnexa to exhibit pseudoepitheliomatous hyperplasia of the overlaying epithelium, a pathologic feature associated with granular cell tumors originating elsewhere in the body.
D003230:Conjunctival Neoplasms / Q000473:pathology*; D005142:Eyelid Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D006965:Hyperplasia / Q000473:pathology; D008875:Middle Aged; D009379:Neoplasms, Muscle Tissue / Q000473:pathology*