title: Malignant adnexal neoplasms.
abstract: Malignant cutaneous adnexal neoplasms are one of the most challenging areas of dermatopathology. Tumors of the pilosebaceous apparatus can occur as single-lineage neoplasms or may manifest as complex proliferations with multilineal differentiation patterns including not only the germinative component of the hair bulb, the inner or outer root sheath epithelium and the sebaceous gland and duct, but also the sweat duct components that relate to the apocrine secretory apparatus which empties into the follicle near the follicular bulge. Eccrine and apocrine neoplasms present a bewildering array of morphologies, which often defy precise classification. The purpose of this review is to discuss in detail the malignant neoplasms of the cutaneous adnexae and their benign and prognostically indeterminate mimics.
authors.affiliation: Department of Dermatology, University of Oklahoma and Regional Medical Laboratory, St John Medical Center, Tulsa, OK 74114-4109, USA. ncrowson@sjmc.org
authors.forename: A Neil
authors.initials: AN
authors.lastname: Crowson
authors.forename: Cynthia M
authors.initials: CM
authors.lastname: Magro
authors.forename: Martin C
authors.initials: MC
authors.lastname: Mihm
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D018396:Mucin-1 / Q000032:analysis; D012627:Sebaceous Glands / Q000737:chemistry / Q000473:pathology*; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology*
chemical_list: D018396:Mucin-1