A Rare Case of Recurrent Eccrine Poroma Underlying Gluteal A
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Eccrine poroma is a benign adnexal neoplasm originating from epidermal sweat ducts mainly affecting the palmoplantar skin, buttock as a location of origin of poroma has rarely been reported, it is the first reported case of recurrent poroma in this site. A case of a 62-year-old female presenting with clinical features of a left-side gluteal abscess. Upon physical examination, a firm nodule was palpated; the white blood cell count was 9500/µL, and a random serum glucose level was measured to 140?mg/dL. Surgical drainage and excision of the nodule were conducted. Microbiological examination based on culture and sensitivity testing of the drained fluid revealed E.coli organism susceptible to amikacin and cefepime. The resected nodule was sent to the histopathology laboratory and cefepime medical treatment was advised.

Gross pathological examination revealed a fibro-fatty tissue piece measuring 6.5?×?2.5?×?1.2?cm covered by a skin piece, with an underlying, relatively circumscribed soft-to-firm yellowish nodule measuring 3.5?×?2?cm with a least surgical margin of 0.2?cm. Microscopic examination showed downward growth attached to the epidermis and reaching into the deep dermis, composed of cords and nests of small keratinocytes; the nests were sharply delimited from the adjacent epidermis; also duct-like structures and occasional islands of squamous epithelium were seen. Dermal reactive vessels and mixed inflammatory cells with neutrophil collections were present. The reporting pathologist suggested a diagnosis of poroma vs low grade malignant tumor; subsequently, a blinded consultation with three other pathologists confirmed the diagnosis of EP with clear margins. The patient showed a good response for the treatment with no symptoms or remnant mass lesion could be detected in the regular follow-up during the next 12 months.

Source: https://www.sciencedirect.com/science/article/pii/S2210261220306428?dgcid=rss_sd_all