Abstract
Purpose
To report a case of congenital phakomatous choristoma (PC) of the eyelid, a rare tumor of lenticular anlage in the subcutaneous tissue and dermis.
Case
A boy had a mass in the right lower eyelid near the inner canthus at birth. At age 10 months, the tumor was excised.
Results
The tumor cells showed intense immunoreactivity positive for S-100 protein, vimentin, and periodic acid-Schiff. Keratin markers, epithelial membrane antigen, glial fibrillary acidic protein, muscle specific actin, and epithelial membrane antigen were negative. The histopathologic features were consistent with those of a PC.
Conclusions
This histopathologic and immunoreactivity study supports the proposal that PC is a rare entity of lenticular anlage origin. Only 18 such cases have been described previously.
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