title: Prognostic factors for the recurrence of sporadic desmoid-type fibromatosis after macroscopically complete resection: Analysis of 114 patients at a single institution.
abstract: OBJECTIVE
  Desmoid-type fibromatoses (DFs) are rare soft-tissue neoplasms with frequent local recurrence. We sought to determine the prognostic factors that are predictive of recurrence-free survival (RFS) for these tumors.
  
  
  METHODS
  One hundred and fourteen consecutive patients with sporadic DF who received macroscopically complete resection (R0/R1) at a single tertiary hospital between 1985 and 2014 were included. A total of 10 clinical and pathological parameters were analyzed. Histologic slides and the margin status were re-checked; close margins (≤1-mm clearance) were noted separately and were considered together with the R1 margin.
  
  
  RESULTS
  The median follow-up interval was 72.5 months. Thirty-five (30.7%) patients had a local recurrence. The 2-, 5- and 10-year RFSs were 75.2%, 72.1% and 67.0%, respectively. In univariate analysis, age, tumor size, tumor site, margin status and presence of lesions at multiple sites had a significant impact on RFS. In multiple analysis, younger age (age<30 vs. age≥50 years: hazard ratio [HR] = 4.96; 95% confidence interval [95% CI], 1.50-16.4; p = 0.009); an extra-abdominal site (extra-abdominal site vs. other sites: HR = 4.08; 95% CI, 1.49-11.2; p = 0.006); larger tumor size (≥8 cm vs. <8 cm: HR = 2.43; 95% CI, 1.15-5.13; p = 0.021); and close or positive margin status (close margin/R1 vs. R0: HR = 2.64; 95% CI, 1.11-6.25; p = 0.027) were independent, unfavorable prognostic factors.
  
  
  CONCLUSIONS
  Different prognostic subgroups were identified that allow for the better selection of favorable therapeutic strategies. The role of the margin status should be considered with caution and should be based on a more precise pathological result.
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China. Electronic address: surgerypumch@sina.com.
authors.forename: X D
authors.initials: XD
authors.lastname: He
authors.affiliation: Department of Head and Neck Surgery, Cancer Hospital (Institute), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China. Electronic address: yabing_zhang@sina.cn.
authors.forename: Y B
authors.initials: YB
authors.lastname: Zhang
authors.affiliation: Peking University Wu-Jieping Urology Center, Peking University Shougang Hospital, Peking University Health Science Center, Beijing, 100144, China. Electronic address: wanglei_09243633@163.com.
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of General Surgery, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China. Electronic address: raining2902@163.com.
authors.forename: M L
authors.initials: ML
authors.lastname: Tian
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China. Electronic address: liuwei203@126.com.
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China. Electronic address: doctorqupumch@126.com.
authors.forename: Q
authors.initials: Q
authors.lastname: Qu
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China. Electronic address: lisalee@sina.com.
authors.forename: B L
authors.initials: BL
authors.lastname: Li
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China. Electronic address: taohong_0423@163.com.
authors.forename: T
authors.initials: T
authors.lastname: Hong
authors.affiliation: Peking University Wu-Jieping Urology Center, Peking University Shougang Hospital, Peking University Health Science Center, Beijing, 100144, China. Electronic address: ningchenli_puwjpuc@sina.com.
authors.forename: N C
authors.initials: NC
authors.lastname: Li
authors.affiliation: Peking University Wu-Jieping Urology Center, Peking University Shougang Hospital, Peking University Health Science Center, Beijing, 100144, China. Electronic address: yanqunna69@126.com.
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Na
mesh_terms: D000008:Abdominal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002681:China / Q000453:epidemiology; D018572:Disease-Free Survival; D005260:Female; D018222:Desmoid Tumors / Q000175:diagnosis* / Q000453:epidemiology / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007813:Laparotomy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis* / Q000453:epidemiology; D011379:Prognosis; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D015996:Survival Rate / Q000639:trends; D013997:Time Factors; D055815:Young Adult
keywords: Fibromatosis; Recurrence-free survival; Risk factors; Surgery