Lymphoepithelioma-like carcinoma arising in the scar from a previously excised basal cell carcinoma

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We report a case of a primary lymphoepithelioma-like carcinoma of the skin (LELCS) associated with scar from a previous excision of basal cell carcinoma. The patient was a 68-year-old female with a 3.0 mm skin-colored pearly papule on her forehead that developed over 2–3 months. The patient had a history of a basal cell carcinoma in the same location, which was completely excised 1 year earlier. A biopsy and subsequent excision of the tumor were performed. The tumor consisted of small islands of large pleomorphic mitotically active epithelioid cells surrounded by a very dense lymphoplasmacytic infiltrate. The tumor was associated with dermal scar. There was no connection of tumor with the unremarkable epidermis. Immunohistochemical examination showed that the epithelioid tumor cells were positive for pan-cytokeratin and epithelial membrane antigen, supporting the morphologic impression of LELCS. The lesion was negative for Epstein-Barr virus. Retrospective review of the original excision specimen confirmed the diagnosis of an ordinary basal cell carcinoma. Forty-five cases of LELCS have been reported to date. We report the first case of LELCS to arise in the scar from an excision of a cutaneous malignancy

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