title: Space sarcomas: extra compartmental soft tissue tumors of the lower extremities a systematic approach to sarcomas of the femoral triangle, sartorial canal, and popliteal space.
abstract: BACKGROUND
  Extra-compartmental soft tissue sarcomas may grow in virtual spaces in close proximity to major neurovascular structures and thus, require a complex resection. We analyzed the general principles by which these resections are planned.
  
  
  METHODS
  We retrospectively analyzed 53 patients with sarcomas located in the femoral triangle (15), sartorial canal (16), and the popliteal fossa (22). These lesions were grouped into three categories based on involvement of spatial structure; neurovascular involvement = 13, musculofascial involvement = 19 and no involvement = 11.
  
  
  RESULTS
  Limb sparing surgery was feasible in lesions that had either no structural or musculofascial involvement. Amputation, however, was required in 3 of 13 patients with neurovascular involvement because of gross involvement of the surrounding tissues. Overall, limb sparing was feasible in 94% (50 of 53 patients). The 2- and 5-year local recurrence rates were 10% and 14%, respectively. Five-year survival was 88%.
  
  
  CONCLUSIONS
  Limb sparing resection of space sarcomas is feasible in the majority of extra-compartmental sarcomas by utilizing a systematic approach which emphasizes specific planes of resection.
authors.affiliation: Department of Orthopedic Oncology, Washington Cancer Institute, Washington Hospital Center, Washington, DC 20010, USA. Amirsternheim@gmail.com
authors.forename: Amir
authors.initials: A
authors.lastname: Sternheim
authors.forename: Jacob
authors.initials: J
authors.lastname: Bickels
authors.forename: Tomer
authors.initials: T
authors.lastname: Ben-Tov
authors.forename: Martin M
authors.initials: MM
authors.lastname: Malawer
mesh_terms: D000671:Amputation, Surgical / Q000706:statistics & numerical data; D000971:Antineoplastic Combined Chemotherapy Protocols; D017024:Chemotherapy, Adjuvant; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007866:Leg / Q000033:anatomy & histology / Q000098:blood supply / Q000294:innervation / Q000601:surgery*; D023821:Limb Salvage / Q000379:methods*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000601:surgery; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D012509:Sarcoma / Q000401:mortality / Q000473:pathology / Q000601:surgery* / Q000628:therapy; D015996:Survival Rate; D016896:Treatment Outcome