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Abstract
Digital papillary adenocarcinoma (DPAC) is a rare, low-grade sweat gland carcinoma primarily found on the hands, fingers, or toes and predominantly affecting males. Distinguishing DPAC from benign sweat gland tumors can be challenging. We present the case of a 52-year-old patient with a progressive tumor on the finger initially misdiagnosed as a viral wart. Histological examination revealed a cytologically basophilic sweat gland tumor with tubular structures, papillary protrusions, and a characteristic immunohistochemical staining pattern for CK 7 and Actin. HPV-42 positivity and molecular analysis confirmed the diagnosis of DPAC. HPV-42 has been strongly associated with DPAC. Additionally, p16 positivity and BRAFV600E negativity were observed. These findings aid in the differential diagnosis of acral sweat gland tumors and guide clinical management, including with respect to the potential for recurrence and metastasis.
Published Version
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