Lens Material of the Eyelid Masquerading as Phakomatous Choristoma After Cataract Surgery

Cataract surgery is the most commonly performed surgery worldwide. While retained lens fragments after cataract surgery are common, to our knowledge, there is no prior case report of the lens material being deposited outside of the eye. Here, we present a case of an elderly patient with an upper eyelid lesion containing a fragment of the basement membrane and proteinaceous lens-like material, initially mistaken as phakomatous choristoma. Phakomatous choristoma is a type of benign congenital tumor consisting of lens tissue, which is thought to be secondary to aberrant migration during lens formation. Upon further review, it was later confirmed to be postoperative capsular material embedded into the eyelid.