Intraoperative discovery of a neurofibroma during routine ptosis surgery.

A noncosmetic blepharoplasty with levator tuck was planned to repair a congenital ptosis presumed to be caused by levator maldevelopment. During surgery a mass was found in the lid, revealing the ptosis to be mechanical in nature. Biopsy and subsequent pathological exam revealed this to be a plexiform neurofibroma in a reportedly undiagnosed patient.