title: Clear cell fibrous papule: report of a case mimicking a balloon cell nevus.
abstract: Clear cell fibrous papule (FP) is a rare variant of FP. We report a 39-year-old female patient who presented with a dome-shaped papule on the nose. The diagnosis of clear cell FP was made based on histological and immunohistochemical studies. Interestingly, scattered S-100 cells were admixed within the lesion, a finding hitherto not reported. The S-100 positivity may be misleading and should be cautiously interpreted.
authors.affiliation: Department of Dermatology, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan.
authors.forename: Ying-Yi
authors.initials: YY
authors.lastname: Chiang
authors.forename: Hsiou-Hsin
authors.initials: HH
authors.lastname: Tsai
authors.forename: Woan-Ruoh
authors.initials: WR
authors.lastname: Lee
authors.forename: Kuo-Hsien
authors.initials: KH
authors.lastname: Wang
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009363:Neoplasm Proteins / Q000378:metabolism; D009506:Nevus / Q000378:metabolism / Q000473:pathology*; D009669:Nose Neoplasms / Q000378:metabolism / Q000473:pathology*; D009418:S100 Proteins / Q000378:metabolism; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology*
chemical_list: D009363:Neoplasm Proteins; D009418:S100 Proteins