title: [Predictors of local recurrence and survival in primary retroperitoneal leiomyosarcoma].
abstract: OBJECTIVE
  To investigate the predictors of local recurrence and survival in primary retroperitoneal leiomyosarcoma (PRLS).
  
  
  METHODS
  A retrospective analysis was conducted on 46 cases of PRLS between August 2006 and April 2012. There were 9 male and 37 female patients, and they were 30-79 year old (median 49 year old). Kaplan-Meier estimations and Cox regression analyses were performed.
  
  
  RESULTS
  The tumor size were 5-36 cm, and 29 cases (63.1%) of this group was more than 10 cm. Local 3- and 5-year control rates after complete resection were 47% and 30%. FNCLCC (Fédération Nationale des Centres de Lutte Contre le Cancer) grading (RR = 3.10, 95%CI: 1.59-6.04), gender (RR = 5.30, 95%CI: 1.64-17.13) and blood loss (RR = 3.12, 95%CI: 1.28-7.60) were independent prognostic factor of local recurrence in multivariable analysis (P < 0.05). The 5-year disease-free survival rates after complete resection of PRLS was 26%; and the 5-year disease-specific survival (DSS) rates after complete resection was 48%. The median DSS was 60 months in negative margin of resection and 50 months in positive margin. However, by multivariate analysis, only FNCLCC grading was significant independent predictors of DSS (RR = 2.01, 95%CI: 1.16-3.49, P = 0.013).
  
  
  CONCLUSIONS
  Gender, FNCLCC grading and blood loss were independent prognostic factor of local recurrence. The disease-specific survival in PRLS varied significantly according to FNCLCC grading.
authors.forename: Guibing
authors.initials: G
authors.lastname: Chen
authors.forename: Yang
authors.initials: Y
authors.lastname: Yan
authors.forename: Chunhong
authors.initials: C
authors.lastname: Xiao
authors.forename: Peiming
authors.initials: P
authors.lastname: Sun
authors.forename: Huchen
authors.initials: H
authors.lastname: Xue
authors.affiliation: Email: lirong@medmail.com.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Li
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D007890:Leiomyosarcoma / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology*; D011379:Prognosis; D012186:Retroperitoneal Neoplasms / Q000473:pathology*; D012189:Retrospective Studies; D015996:Survival Rate