A skin tumor in a young girl. Diagnosis: Clear cell hidradenoma.

摘要

A nine-year-old girl attended our clinic with a slowly-enlarging nodule on the left leg. The lesion had arisen one year ago, gradually enlarged and ulcerated from two different areas. She did not report trauma to the location of the lesion previously. On dermatological examination, a 3.5 x 2 cm, firm, non-tender, erythematous tumoral lesion was seen on the left leg. Its surface was smooth and two ulcerated areas were observed [Figure 1]. There was no lymphadenopathy in the left inguinal region. The patient was otherwise in good health and routine laboratory tests were normal. The tumor was totally excised. Histopathological examination revealed a circumscribed tumor centered in the dermis connected with the epidermis. The tumor was composed of clear and polyhedral cells. Focally, there were cystic spaces and a few duct-like structures [Figures 2a, b and 3]. Histochemically, the cytoplasm of clear cells and the lumen of duct-like structures showed PAS-positive, d-PAS-resistant staining.