Aggressive Sebaceous Gland Hyperplasia in a Young Girl With MSH2 Gene Mutation: A Rare Presentation.

Sebaceous gland hyperplasia is a benign cutaneous entity commonly seen in older men. Occasionally, it can develop in young patients on immunosuppression with cyclosporine or in adolescent boys in the peripubertal age group. It is extremely rare in young children with no reports of eyelid involvement. It is believed to have no systemic associations, unlike sebaceous adenoma, which is associated with Muir-Torre syndrome. Herein, the authors present a rare case of a young girl with recurrent and aggressive eyelid sebaceous hyperplasia who was treated by a wide local excision of the lesion. The histopathology showed intact nuclear expression of mismatch repair proteins MLH 1, MSH 2, MSH 6, and PMS 2, and the genetic testing revealed a missense mutation in the MSH2 gene.