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Preoperative versus Postoperative Radiotherapy in Soft-Tissue Sarcoma of the Limbs: a Randomised Trial.

·Lancet·2002·1,587 citations·Oncology
DOI·PubMed
SummaryAbstract on PubMed →

This multicenter RCT randomized 190 adults with extremity soft-tissue sarcoma to preoperative (50 Gy/25 fractions) versus postoperative radiotherapy (66 Gy/33 fractions). The primary question: does radiation timing affect major wound complication rates within 120 days of surgery? Stratification was by tumor size (≤10 cm vs >10 cm).

Study Snapshot

Design
Multicenter RCT
Blinding: Open-label
Setting: Multicenter, Canada
Funding: NCI Canada
Objective
Determine whether preoperative vs postoperative radiotherapy affects wound complication rates in limb sarcoma
Outcome(s)
Major wound complication rate within 120 days of surgery
Subjects
190 adult limb soft-tissue sarcoma patients
  • 94Pre
  • 96Post
Inclusion
  • Limb soft-tissue sarcoma without metastasis
  • Need for combined surgery and radiotherapy
  • Age >15 years
Exclusion
  • Previous radiotherapy to local site
  • Previous chemotherapy or chemotherapy needed
  • Regional or distant metastasis
Follow-up
Median 3.3 years (range 0.27–5.6)
Statistics
Fisher's exact testLogistic regressionKaplan-MeierLog-rank test

Key Findings

  • Preoperative radiation roughly doubled the wound complication rate — an absolute difference that survived multivariate adjustment for tumor size and site:
    –Preoperative: 35% vs Postoperative: 17% (absolute difference 18%, 95% CI 5–30, p=0.01)
  • Three independent predictors of wound complication emerged from multivariate logistic regression:
    –Anatomical site (lower vs upper extremity) — OR 10.4 (95% CI 1.33–81.1)
    –Radiation timing (preop vs postop) — OR 3.08 (95% CI 1.43–6.64)
    –Maximum tumor size — OR 1.11 per cm (95% CI 1.05–1.18)
  • Wound complication risk varied dramatically by site, making location the critical counseling variable:
    –Upper leg: 45% (preop) vs 28% (postop)
    –Lower leg: 38% (preop) vs 5% (postop) — starkest contrast
    –Upper arm: 10% (preop) vs 0% (postop)
    –Lower arm: 0% in both groups
  • Local recurrence (p=0.71), distant failure (p=0.79), and progression-free survival (p=0.83) were identical between groups; overall survival marginally favored preoperative radiotherapy (p=0.0481), but the trial was underpowered for this endpoint and the analysis was not pre-specified.
  • Postoperative radiotherapy caused substantially more acute skin toxicity and required larger fields and higher dose — the biologic cost of irradiating a surgically disrupted bed:
    –Grade ≥2 acute skin toxicity: 68% vs 36% (p<0.0001)
    –Median field size: 416 vs 333 cm²
    –Total dose: 66 vs 50 Gy
Board PearlPreoperative radiotherapy for extremity STS doubles wound complications (35% vs 17%) but uses lower dose and smaller fields than postoperative treatment.

Clinical Relevance

Radiation timing in extremity sarcoma is a genuine trade-off, not a clear winner. Before this trial, the wound complication excess with preoperative radiation was documented only in retrospective series prone to selection bias — surgeons tended to choose preoperative radiation for more advanced lesions, inflating apparent complication rates.

This RCT quantified the trade-off with level I evidence: preoperative radiation increases wound complication risk by 18% in absolute terms, but spares patients from larger fields, higher doses, and nearly double the rate of severe acute skin toxicity.

When counseling a patient on radiation timing, location matters as much as anything else. Lower leg tumors carry a 38% wound complication rate with preoperative radiation vs 5% postoperative. That gap should drive decision-making. Upper extremity tumors show minimal difference and may actually favor preoperative radiation to protect adjacent structures like the brachial plexus.

The practical framework this paper established: individualize based on grade, size, and anatomical site. For a large, high-grade thigh or lower leg sarcoma in a patient with healing risk factors (diabetes, smoking), postoperative radiation avoids a wound disaster. For an upper arm lesion where field size and dose to adjacent neurovascular structures are the concern, preoperative radiation is the better trade.

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|

Preoperative versus Postoperative Radiotherapy in Soft-Tissue Sarcoma of the Limbs: a Randomised Trial.

·Lancet·2002·1,587 citations·Oncology
DOI·PubMed
SummaryAbstract on PubMed →

This multicenter RCT randomized 190 adults with extremity soft-tissue sarcoma to preoperative (50 Gy/25 fractions) versus postoperative radiotherapy (66 Gy/33 fractions). The primary question: does radiation timing affect major wound complication rates within 120 days of surgery? Stratification was by tumor size (≤10 cm vs >10 cm).

Study Snapshot

Design
Multicenter RCT
Blinding: Open-label
Setting: Multicenter, Canada
Funding: NCI Canada
Objective
Determine whether preoperative vs postoperative radiotherapy affects wound complication rates in limb sarcoma
Outcome(s)
Major wound complication rate within 120 days of surgery
Subjects
190 adult limb soft-tissue sarcoma patients
  • 94Pre
  • 96Post
Inclusion
  • Limb soft-tissue sarcoma without metastasis
  • Need for combined surgery and radiotherapy
  • Age >15 years
Exclusion
  • Previous radiotherapy to local site
  • Previous chemotherapy or chemotherapy needed
  • Regional or distant metastasis
Follow-up
Median 3.3 years (range 0.27–5.6)
Statistics
Fisher's exact testLogistic regressionKaplan-MeierLog-rank test

Key Findings

  • Preoperative radiation roughly doubled the wound complication rate — an absolute difference that survived multivariate adjustment for tumor size and site:
    –Preoperative: 35% vs Postoperative: 17% (absolute difference 18%, 95% CI 5–30, p=0.01)
  • Three independent predictors of wound complication emerged from multivariate logistic regression:
    –Anatomical site (lower vs upper extremity) — OR 10.4 (95% CI 1.33–81.1)
    –Radiation timing (preop vs postop) — OR 3.08 (95% CI 1.43–6.64)
    –Maximum tumor size — OR 1.11 per cm (95% CI 1.05–1.18)
  • Wound complication risk varied dramatically by site, making location the critical counseling variable:
    –Upper leg: 45% (preop) vs 28% (postop)
    –Lower leg: 38% (preop) vs 5% (postop) — starkest contrast
    –Upper arm: 10% (preop) vs 0% (postop)
    –Lower arm: 0% in both groups
  • Local recurrence (p=0.71), distant failure (p=0.79), and progression-free survival (p=0.83) were identical between groups; overall survival marginally favored preoperative radiotherapy (p=0.0481), but the trial was underpowered for this endpoint and the analysis was not pre-specified.
  • Postoperative radiotherapy caused substantially more acute skin toxicity and required larger fields and higher dose — the biologic cost of irradiating a surgically disrupted bed:
    –Grade ≥2 acute skin toxicity: 68% vs 36% (p<0.0001)
    –Median field size: 416 vs 333 cm²
    –Total dose: 66 vs 50 Gy
Board PearlPreoperative radiotherapy for extremity STS doubles wound complications (35% vs 17%) but uses lower dose and smaller fields than postoperative treatment.

Clinical Relevance

Radiation timing in extremity sarcoma is a genuine trade-off, not a clear winner. Before this trial, the wound complication excess with preoperative radiation was documented only in retrospective series prone to selection bias — surgeons tended to choose preoperative radiation for more advanced lesions, inflating apparent complication rates.

This RCT quantified the trade-off with level I evidence: preoperative radiation increases wound complication risk by 18% in absolute terms, but spares patients from larger fields, higher doses, and nearly double the rate of severe acute skin toxicity.

When counseling a patient on radiation timing, location matters as much as anything else. Lower leg tumors carry a 38% wound complication rate with preoperative radiation vs 5% postoperative. That gap should drive decision-making. Upper extremity tumors show minimal difference and may actually favor preoperative radiation to protect adjacent structures like the brachial plexus.

The practical framework this paper established: individualize based on grade, size, and anatomical site. For a large, high-grade thigh or lower leg sarcoma in a patient with healing risk factors (diabetes, smoking), postoperative radiation avoids a wound disaster. For an upper arm lesion where field size and dose to adjacent neurovascular structures are the concern, preoperative radiation is the better trade.

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