Synovial chondromatosis of the middle ear: a rare differential diagnosis to cholesteatoma.

Synovial chondromatosis (SC) is a rare benign disorder, usually found in larger joints. This case report describes an elderly woman with a bulging mass behind the left eardrum, slowly progressing in size. On surgical exploration and biopsy, the patient was diagnosed with SC of the incudomalleolar joint.