title: Characteristics of Cutaneous Lymphomas in Korea According to the New WHO-EORTC Classification: Report of a Nationwide Study.
abstract: BACKGROUND
  Previously, cutaneous lymphomas were classified according to either the European Organization for the Research and Treatment of Cancer (EORTC) or the World Health Organization (WHO) classification paradigms. The aim of this study was to determine the relative frequency of Korean cutaneous lymphoma according to the new WHO-EORTC classification system.
  
  
  METHODS
  A total of 517 patients were recruited during a recent 5 year-period (2006-2010) from 21 institutes and classified according to the WHO-EORTC criteria.
  
  
  RESULTS
  The patients included 298 males and 219 females, and the mean age at diagnosis was 49 years. The lesions preferentially affected the trunk area (40.2%). The most frequent subtypes in order of decreasing prevalence were mycosis fungoides (22.2%), peripheral T-cell lymphoma (17.2%), CD30+ T-cell lymphoproliferative disorder (13.7%), and extranodal natural killer/T (NK/T) cell lymphoma, nasal type (12.0%). Diffuse large B-cell lymphoma accounted for 11.2% of cases, half of which were secondary cutaneous involvement; other types of B-cell lymphoma accounted for less than 1% of cases.
  
  
  CONCLUSIONS
  In comparison with data from Western countries, this study revealed relatively lower rates of mycosis fungoides and B-cell lymphoma in Korean patients, as well as higher rates of subcutaneous panniculitis-like T-cell lymphoma and NK/T cell lymphoma.
authors.affiliation: Department of Pathology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Jae Ho
authors.initials: JH
authors.lastname: Han
authors.affiliation: Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Young-Hyeh
authors.initials: YH
authors.lastname: Ko
authors.affiliation: Department of Pathology, Inje University Seoul Paik Hospital, Seoul, Korea.
authors.forename: Yun Kyung
authors.initials: YK
authors.lastname: Kang
authors.affiliation: Department of Pathology, Konkuk University School of Medicine, Seoul, Korea.
authors.forename: Wan-Seop
authors.initials: WS
authors.lastname: Kim
authors.affiliation: Department of Pathology, Veterans Health Service Medical Center, Seoul, Korea.
authors.forename: Yoon Jung
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Pathology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Insun
authors.initials: I
authors.lastname: Kim
authors.affiliation: Department of Pathology, Inje University Sanggye Paik Hospital, Seoul, Korea.
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Pathology, Hallym University Sacred Heart Hospital, Anyang, Korea.
authors.forename: Soo Kee
authors.initials: SK
authors.lastname: Min
authors.affiliation: Department of Pathology, Hanyang University College of Medicine, Seoul, Korea.
authors.forename: Chan-Kum
authors.initials: CK
authors.lastname: Park
authors.affiliation: Department of Pathology, Asan Medical Center, Seoul, Korea.
authors.forename: Chan-Sik
authors.initials: CS
authors.lastname: Park
authors.affiliation: Department of Pathology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Bong-Kyung
authors.initials: BK
authors.lastname: Shin
authors.affiliation: Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Woo Ick
authors.initials: WI
authors.lastname: Yang
authors.affiliation: Department of Pathology, Hanyang University Guri Hospital, Guri, Korea.
authors.forename: Young-Ha
authors.initials: YH
authors.lastname: Oh
authors.affiliation: Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea.
authors.forename: Jong Sil
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Pathology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Juhie
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Pathology, Dankook University College of Medicine, Cheonan, Korea.
authors.forename: Tae Hui
authors.initials: TH
authors.lastname: Lee
authors.affiliation: Department of Pathology, Eulji University Hospital, Daejeon, Korea.
authors.forename: Hyekyung
authors.initials: H
authors.lastname: Lee
authors.affiliation: Department of Pathology, Eulji General Hospital, Seoul, Korea.
authors.forename: Ho Jung
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Pathology, Seoul National University, Seoul, Korea.
authors.forename: Yoon Kyung
authors.initials: YK
authors.lastname: Jeon
authors.affiliation: Department of Pathology, Ulsan University College of Medicine, Ulsan, Korea.
authors.forename: Hee Jeong
authors.initials: HJ
authors.lastname: Cha
authors.affiliation: Department of Pathology, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Yoo-Duk
authors.initials: YD
authors.lastname: Choi
authors.affiliation: Department of Pathology, Seoul National University, Seoul, Korea.
authors.forename: Chul Woo
authors.initials: CW
authors.lastname: Kim
keywords: Classification; Cutaneous lymphoma; EORTC; World Health Organization