Aggressive Extraocular Sebaceous Carcinoma of the Scalp Involving the Brain in a Patient With Muir-Torre Syndrome

The American Journal of Dermatopathology
Ladislav HadravskyDenisa Kacerovska

Abstract

This article reports an unusual case of aggressive extraocular sebaceous carcinoma located on the scalp with subsequent usurpation of the bone and penetrating through the bone and meninges to the brain in a 56-year-old man affected by Muir-Torre syndrome. Microscopically, the sebaceous neoplasm was located in the middle to deep dermis without any connection to the epidermis and showed a multinodular growth with neoplastic nodules with a central comedo-type necrosis separated from each other by fibrovascular stroma. The nodules were composed of varying proportions of mature sebaceous cells and atypical basaloid cells with high degree of atypia, including high nuclear/cytoplasmic ratio, nuclear pleomorphism, macronucleoli, atypical mitoses, and necrosis. The neoplasm was totally removed. Histopathological examinations of the recurrent lesion showed identical morphological features and, in addition, signs of the tumors growing through the periosteum were noted. In the final excision specimen, both the dura mater and the brain tissue were infiltrated by the sebaceous carcinoma. The diagnosis of Muir-Torre syndrome was confirmed by molecular genetic investigation that revealed an identical germline mutation in MSH2 gene in several f...Continue Reading

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Citations

Jul 7, 2017·Current Treatment Options in Oncology·Thomas Knackstedt, Faramarz H Samie
Oct 16, 2021·The American Journal of Dermatopathology·Jose A PlazaMartin Sangueza

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