title: Alopecic and Aseptic Nodules of the Scalp/Pseudocyst of the Scalp: Clinicopathological and Therapeutic Analyses in 11 Korean Patients.
abstract: Alopecic and aseptic nodule of the scalp (AANS) is a rare disease entity first reported in 1992 as pseudocyst of the scalp (PCS). Controversy exists regarding the histopathology and etiology of reported cases.
  
  
  
  We performed this study to analyze the clinical and histopathologic features of AANS/PCS in Korean patients.
  
  
  
  A retrospective review of medical records from 2008 to 2013 at Inje University Busan Paik Hospital was performed.
  
  
  
  Eleven patients were enrolled. All patients were male, and their mean age was 21.6 years. Most patients had a solitary nodule (10/11) located predominantly on the vertex. The mean nodule size was 20 mm. Inflammatory cell infiltration in the deep dermis was a histologic feature of AANS/PCS. Eight patients showed granulomatous infiltration. All patients were treated with short-term antibiotics and intralesional steroid injection.
  
  
  
  Our results suggest that dermatologists should consider AANS when diagnosing an alopecic nodule on the scalp.
authors.affiliation: Department of Dermatology, Busan Paik Hospital, Inje University, Busan, Korea.
authors.forename: Jung Eun
authors.initials: JE
authors.lastname: Seol
authors.forename: In Ho
authors.initials: IH
authors.lastname: Park
authors.forename: Do Hyeong
authors.initials: DH
authors.lastname: Kim
authors.forename: So Hee
authors.initials: SH
authors.lastname: Park
authors.forename: Jeong Nan
authors.initials: JN
authors.lastname: Kang
authors.forename: Hyojin
authors.initials: H
authors.lastname: Kim
authors.forename: Jong Keun
authors.initials: JK
authors.lastname: Seo
mesh_terms: D000293:Adolescent; D000328:Adult; D000505:Alopecia / Q000150:complications* / Q000188:drug therapy / Q000473:pathology*; D019980:Amoxicillin-Potassium Clavulanate Combination / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage; D002511:Cephalosporins / Q000627:therapeutic use; D002648:Child; D004359:Drug Therapy, Combination; D004814:Epidermal Cyst / Q000150:complications* / Q000188:drug therapy / Q000473:pathology*; D006801:Humans; D015552:Injections, Intralesional; D008297:Male; D056910:Republic of Korea; D012189:Retrospective Studies; D012536:Scalp Dermatoses / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology*; D014221:Triamcinolone / Q000008:administration & dosage; D055815:Young Adult
chemical_list: D000900:Anti-Bacterial Agents; D000893:Anti-Inflammatory Agents; D002511:Cephalosporins; D014221:Triamcinolone; D019980:Amoxicillin-Potassium Clavulanate Combination