title: Skin adnexal neoplasms--part 2: an approach to tumours of cutaneous sweat glands.
abstract: Tumours of cutaneous sweat glands are uncommon, with a wide histological spectrum, complex classification and many different terms often used to describe the same tumour. Furthermore, many eccrine/apocrine lesions coexist within hamartomas or within lesions with composite/mixed differentiation. In addition to the eccrine and apocrine glands, two other skin sweat glands have recently been described: the apoeccrine and the mammary-like glands of the anogenital area. In this review (the second of two articles on skin adnexal neoplasms), common as well as important benign and malignant lesions of cutaneous sweat glands are described, and a summary for differentiating primary adnexal neoplasms from metastatic carcinoma is outlined, striving to maintain a common and acceptable terminology in this complex subject. Composite/mixed adnexal tumours are also discussed briefly.
authors.affiliation: Department of Laboratory Medicine and Pathobiology, University of Toronto and University Health Network, Toronto, Ontario, Canada.
authors.forename: Nidal A
authors.initials: NA
authors.lastname: Obaidat
authors.forename: Khaled O
authors.initials: KO
authors.lastname: Alsaad
authors.forename: Danny
authors.initials: D
authors.lastname: Ghazarian
mesh_terms: D008949:Adenoma, Pleomorphic / Q000473:pathology; D006607:Adenoma, Sweat Gland / Q000473:pathology; D018280:Carcinoma, Skin Appendage / Q000473:pathology; D006801:Humans; D018294:Neoplasms, Adnexal and Skin Appendage / Q000473:pathology*; D013544:Sweat Gland Neoplasms / Q000473:pathology*; D018252:Syringoma / Q000473:pathology