title: A retrospective clinicopathological analysis of appendiceal tumors from 3,744 appendectomies: a single-institution study.
abstract: OBJECTIVE
  This study was conducted to describe the clinicopathological characteristics of appendiceal tumors and to evaluate their appropriate management.
  
  
  METHODS
  Between September 2000 and September 2005, 28 appendiceal tumors were identified by a retrospective review of 3,744 appendectomies.
  
  
  RESULTS
  Twenty-eight patients were found to have appendiceal tumors (incidence, 0.7%).The largest single group of tumors were benign mucinous cystadenomas (50%); carcinoids (32.1%) were next, and they were followed by malignant tumors (17.9%). Four out of five patients who had malignant appendiceal tumors presented with periappendiceal abscess. None of the patients was correctly diagnosed preoperatively. One-stage curative resection was possible in more than 76% of the patients, and the rate of making the correct preoperative diagnosis was 35%.
  
  
  CONCLUSIONS
  Most appendiceal tumors presented with appendicitis and periappendiceal abscess. Appendiceal tumors should be included in the differential diagnosis when an unexpected appendiceal mass is encountered during appendectomy.
authors.affiliation: Department of Surgery, Gil Medical Center, Gachon University of Medicine and Science, 1198 Guwol-dong, Namdong-gu, Incheon, South Korea 405-760.
authors.forename: Won-Suk
authors.initials: WS
authors.lastname: Lee
authors.forename: Sang Tae
authors.initials: ST
authors.lastname: Choi
authors.forename: Jung Nam
authors.initials: JN
authors.lastname: Lee
authors.forename: Keon Kug
authors.initials: KK
authors.lastname: Kim
authors.forename: Yeon Ho
authors.initials: YH
authors.lastname: Park
authors.forename: Jeong Heum
authors.initials: JH
authors.lastname: Baek
mesh_terms: D000328:Adult; D000368:Aged; D001062:Appendectomy; D001063:Appendiceal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D003710:Demography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome