title: Characteristics of primary cutaneous lymphoma according to WHO-EORTC classification in Korea.
abstract: BACKGROUND
  Primary cutaneous lymphoma (PCL) is an extranodal non-Hodgkin lymphoma with primary involvement of the skin. Epidemiological data on PCLs according to the World Health Organization/European Organization for Research and Treatment of Cancer classification (WHO-EORTC) has not been investigated in Korea to date.
  
  
  OBJECTIVE
  To evaluate the demographic characteristics, clinical and histological features, and survival data of patients with PCL according to the WHO-EORTC classification.
  
  
  METHODS
  In total, 93 patients with PCL were retrospectively identified from an extensive review of medical records over a 16-year period.
  
  
  RESULTS
  The tumours found included primary cutaneous CD30+ lymphoproliferative disorders, extranodal natural killer/T-cell lymphoma and primary cutaneous diffuse large B-cell lymphoma. We found that 81.6% of the patients had primary cutaneous T-cell and natural killer-cell lymphoma, and 16.2% had primary cutaneous B-cell lymphoma, with 2.2% having precursor haematological neoplasms. The median age was 52 years (range 3-95) and the male : female ratio was 1: 1.16. The 5-year survival rate was 92.5%.
  
  
  CONCLUSIONS
  The incidence rates of many PCL subtypes in Koreans differ from those of other countries.
authors.affiliation: Department of Dermatology, St. Vincent's Hospital, Suwon-si, Korea.
authors.forename: Ji Hyun
authors.initials: JH
authors.lastname: Lee
authors.forename: Ji Hae
authors.initials: JH
authors.lastname: Lee
authors.forename: D S
authors.initials: DS
authors.lastname: Yoo
authors.forename: H
authors.initials: H
authors.lastname: Kang
authors.forename: G M
authors.initials: GM
authors.lastname: Kim
authors.forename: H J
authors.initials: HJ
authors.lastname: Park
authors.forename: C J
authors.initials: CJ
authors.lastname: Park
authors.forename: J D
authors.initials: JD
authors.lastname: Lee
authors.forename: J Y
authors.initials: JY
authors.lastname: Lee
authors.forename: S Y
authors.initials: SY
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D016403:Lymphoma, Large B-Cell, Diffuse / Q000145:classification / Q000453:epidemiology*; D016399:Lymphoma, T-Cell / Q000145:classification / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D012878:Skin Neoplasms / Q000145:classification / Q000453:epidemiology*; D016019:Survival Analysis; D014944:World Health Organization; D055815:Young Adult