title: The establishment of KORCC (KOrean Renal Cell Carcinoma) database.
abstract: OBJECTIVE
  The purpose of this article is to report establishment of the 1st Web-based database (DB) system to collect renal cell carcinoma (RCC) data in Korea.
  
  
  METHODS
  The new Web-based DB system was established to collect basic demographic and clinicopahtological characteristics of a large cohort of patients with RCC in Korea. Data from a total of 6,849 patients were collected from 8 tertiary care hospitals that agreed to participate in organizing the Korean Renal Cell Carcinoma (KORCC) study group as of 1 July 2015. Basic demographic and clinicopathological characteristics were collected. The data of patients who underwent surgical treatments were analyzed to characterize Korean RCC.
  
  
  RESULTS
  We established the 1st Web-based DB of Korean RCC, a database comprising renal mass management cases from multiple centers in Korea. The data of 5,281 patients who underwent surgical management (mean follow-up, 32 months) were analyzed. The most common symptom was incidentally detected renal mass (76.9%). Clinical T1a was the most common (54.3%) stage and mean tumor size was 4.8±4.2 cm. Radical nephrectomy accounted for 62.7% of cases and an open approach was used in 50.7% and 52.2% of radical and partial nephrectomies, respectively. The 5-year overall, cancer-specific and recurrence-free survival rates were 88.1%, 92.2%, and 88.0%, respectively.
  
  
  CONCLUSIONS
  We report the 1st establishment of a Web-based DB system to collect RCC data in Korea. This DB system will provide a solid basis for the characterization of Korean RCC.
authors.affiliation: Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Seok-Soo
authors.initials: SS
authors.lastname: Byun
authors.affiliation: Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Sung Kyu
authors.initials: SK
authors.lastname: Hong
authors.affiliation: Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Sangchul
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Ha Rim
authors.initials: HR
authors.lastname: Kook
authors.affiliation: Department of Urology, Seoul National University of Hospital, Seoul, Korea.
authors.forename: Eunsik
authors.initials: E
authors.lastname: Lee
authors.affiliation: Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Hyeon Hoe
authors.initials: HH
authors.lastname: Kim
authors.affiliation: Department of Urology, Seoul National University of Hospital, Seoul, Korea.
authors.forename: Cheol
authors.initials: C
authors.lastname: Kwak
authors.affiliation: Department of Urology, Seoul National University of Hospital, Seoul, Korea.
authors.forename: Ja Hyeon
authors.initials: JH
authors.lastname: Ku
authors.affiliation: Department of Urology, Seoul National University of Hospital, Seoul, Korea.
authors.forename: Chang Wook
authors.initials: CW
authors.lastname: Jeong
authors.affiliation: Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Ji Youl
authors.initials: JY
authors.lastname: Lee
authors.affiliation: Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Sung Hoo
authors.initials: SH
authors.lastname: Hong
authors.affiliation: Department of Urology, Chungbuk National University College of Medicine, Cheongju, Korea.
authors.forename: Yong-June
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Urology, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Eu Chang
authors.initials: EC
authors.lastname: Hwang
authors.affiliation: Department of Urology, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, Daegu, Korea.
authors.forename: Tae Gyun
authors.initials: TG
authors.lastname: Kwon
authors.affiliation: Department of Urology, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, Daegu, Korea.
authors.forename: Tae-Hwan
authors.initials: TH
authors.lastname: Kim
authors.affiliation: Department of Urology, Korea University Medical Center, Seoul, Korea.
authors.forename: Seok Ho
authors.initials: SH
authors.lastname: Kang
authors.affiliation: Department of Urology, National Cancer Center, Goyang, Korea.
authors.forename: Sung Han
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Urology, National Cancer Center, Goyang, Korea.
authors.forename: Jinsoo
authors.initials: J
authors.lastname: Chung
mesh_terms: D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000453:epidemiology* / Q000473:pathology / Q000601:surgery; D016208:Databases, Factual; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D020407:Internet; D053208:Kaplan-Meier Estimate; D007680:Kidney Neoplasms / Q000453:epidemiology* / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009392:Nephrectomy / Q000009:adverse effects / Q000379:methods; D012042:Registries; D056910:Republic of Korea / Q000453:epidemiology
keywords: Database; Kidney neoplasms; Population characteristics