Troublesome tumours. 1: Adnexal tumours of the skin.

Malignant transformation within benign adnexal skin tumours.

AIMS To report five malignant trichogenic tumours arising in longstanding, previously benign adnexal neoplasms through malignant transformation. Malignant trichogenic adnexal tumours are extremely rare neoplasms. METHODS AND RESULTS The patients were between 55 years and 79 years of age. Three of the tumours were located on the arms, two on the face. Three of our patients had a history of chr...

Troublesome tumours 2: borderline tumours of salivary glands.

Canine Skin Tumours with Adnexal Differentiation: Histopathology and Immunohistochemistry

Thirty nine canine adnexal tumours were histologically and immunohistochemically analysed. They were classified as trichoblastomas, trichoepitheliomas, sebaceous adenomas and epitheliomas, hepatoid gland adenomas and epitheliomas, and aporcine adenocarcinomas. Moreover, hepatoid gland angioadenoma and angioepithelioma were recognised. Studies of follicular tumours revealed coexpression of cytok...

Skin adnexal neoplasms--part 1: an approach to tumours of the pilosebaceous unit.

Skin adnexal neoplasms comprise a wide spectrum of benign and malignant tumours that exhibit morphological differentiation towards one or more types of adnexal structures found in normal skin. Most adnexal neoplasms are relatively uncommonly encountered in routine practice, and pathologists can recognise a limited number of frequently encountered tumours. In this review, the first of two, the n...

Histopathological Study of Skin Adnexal Tumours—Institutional Study in South India

Objective. The aim of this study was correlation of skin adnexal tumors with age, sex, and location and determining its incidence in the Department of Pathology at Dr. D. Y. Patil Medical College and Hospital, Kolhapur, Maharashtra. Material and Methods. 56 cases were included in this study from Jan 2004 to June 2010 with respect to incidence of adnexal tumors, age, and sex distribution. All sl...