An 8-year-old girl presented with a scalp swelling. The swelling was recurrent, reappearing everytime after local excision. She underwent surgery and the histopathologic diagnosis was malignant hidradenoma. This very rare and aggressive tumor is known to occur in elderly population and is histopathologically distinct from its commonly occuring benign counterpart. Malignant hidradenoma is resist...

Hidradenocarcinoma (HAC) is an exceedingly rare and aggressive malignant tumor of the adnexal eccrine apocrine sweat gland. Due to its low incidence rate, nonspecific clinical presentation, similar histopathological features benign hidradenoma (HA), HAC often misdiagnosed as counterpart.

A 65-year-old male presented with a slowly enlarging nodule on his right leg, which had been present for 10 years and which had gradually increased in size over the previous 6 months. Physical examination revealed a red and dark bluish, dome-shaped nodule, 26 mm × 22 mm in size, on the right side of the posterior aspect of his right leg (Fig. 1). Histopathology revealed a well-demarcated, solid...

Background: The Skin Appendageal tumors are a heterogenous group of neoplasms with distinct histological features. The aim of this study is to determine the incidence, age, sex, site, histopathological features and the pattern of differentiation of the appendageal tumors analogous to hair follicles, sebaceous, eccrine and apocrine glands. Materials and methods : This is a retrospective study do...

Hidradenoma papilliferum is a known example of adnexal skin tumours with apocrine differentiation. It is a rare benign tumour which tends to arise from areas with rich concentration of aporine glands such as anogenital region, vulval, perineal, axillae, and periumbilical areas. In this report, the tumour was found in the upper outer quadrant of left breast, being one of the ectopic sites for th...