title: A single lesion showing features of pigmented eccrine poroma and poroid hidradenoma.
abstract: Poroid hidradenoma (PH) is a variant of poroma. This entity was defined by Abenoza and Ackerman in 1990. This neoplasm shows architectural characteristics of hidradenoma (tumor cells confined entirely within the dermis in both solid and cystic components) and cytologic characteristics of poroid neoplasm (poroid and cuticular cells, the latter showing ductal differentiation). We herein document a case of single poroid lesion with the features of both eccrine poroma and PH. The patient was a 55-year-old woman with a pigmented nodular lesion on her upper back for 7 years. The histopathologic features of the lesion were consistent with those of eccrine poroma and PH. Unlike most eccrine poromas, this case was pigmented, clinically and microscopically.
authors.affiliation: Department of Dermatology, Kaohsiung Medical University Hospital, Taiwan.
authors.forename: Hsiu-Hui
authors.initials: HH
authors.lastname: Chiu
authors.forename: Cheng-Che E
authors.initials: CC
authors.lastname: Lan
authors.forename: Chieh-Shan
authors.initials: CS
authors.lastname: Wu
authors.forename: Gwo-Shing
authors.initials: GS
authors.lastname: Chen
authors.forename: Kun-Bow
authors.initials: KB
authors.lastname: Tsai
authors.forename: Po-Hung
authors.initials: PH
authors.lastname: Chen
mesh_terms: D018250:Acrospiroma / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D014408:Biomarkers, Tumor / Q000378:metabolism; D002467:Cell Nucleus / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000378:metabolism; D008543:Melanins / Q000378:metabolism; D008875:Middle Aged; D010858:Pigmentation; D010859:Pigmentation Disorders / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D013544:Sweat Gland Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D008543:Melanins