Synonyms

Sweat gland carcinoma
Sweat gland tumor, malignant

Definitions

Skin
ICD-O-3 topography code:	C44
ICD10:	C44

Sweat gland adenocarcinoma (hidradenocarcinoma) is a slow-growing adnexal neoplasm and the malignant counterpart of hidradenoma. The tumour is composed of one or several dermal or subcutaneous nodules and typically displays apocrine differentiation. Tubular and ductal structures may be present focally. Necrosis en masse is a common feature. The epithelium overlying the lesion may be ulcerated. Hidradenocarcinoma may occur in any area of the body. Most cases arise de novo, but occasionally the tumour is associated with a hidradenoma.
The mean age of patients is 50 years; the tumour seems to affect women slightly more often than men. Hidradenocarcinoma has a tendency to metastasize widely and result in death¹

LeBoit PE, Burg G, Weedon D, Sarasin A (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Skin Tumours
3rd Edition
IARC Press: Lyon 2005

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Vulva
ICD-O-3 topography code:	C51
ICD10:	C51

Sweat gland adenocarcinoma is a malignant tumour arising from the sweat glands.
These tumours are rare in the vulva (<10% of all malignant vulvar tumours). They include eccrine adenocarcinoma, porocarcinoma, clear cell hidradenocarcinoma, and apocrine adenocarcinoma. Apocrine adenocarcinoma may be associated with extramammary Paget disease ²

Click to access Pubmed

Wick MR, Goellner JR, Wolfe JT, Su WP (1985)
Vulvar sweat gland carcinomas.
Arch Pathol Lab Med 109: 43-7

³

Tavassoli FA, Devilee P (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Breast and Female Genital Organs.
3rd Edition
IARC Press: Lyon 2003

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