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98 – INCIDENCE AND SEVERITY OF LYMPHOEDEMA FOLLOWING LIMB SALVAGE OF EXTREMITY SOFT TISSUE SARCOMA



Abstract

Purpose: Lymphoedema is a serious potential complication of the management of extremity soft tissue sarcoma (STS) about which relatively little is known. We aimed to evaluate the incidence of lymphoedema, its severity and associated risk factors following limb salvage for extremity STS.

Method: Lymphoedema severity (EORTC/RTOG) was recorded prospectively in two databases of soft tissue sarcoma patients. Patient’s demographics, tumor characteristics, surgical procedures, radiotherapy dosage, complications and functional outcomes (MSTS, TESS) were also prospectively collected. Charts were also retrospectively abstracted for body mass index (BMI) and medical comorbidities.

Results: 289 patients had sufficient data for analysis (158 male). Mean age was 53 (range 16–88). Mean BMI was 27.4 (range: 15.8–52.1). 209 had lower extremity tumors and 80, upper. Mean tumor size was 8.1 cm (range 1.0–35.6 cm). 77 had no adjuvant radiation, 180 had 50 Gy and 32, 66 Gy. The incidence of lymphoedema was found to be 28.7% (58 mild, 22 moderate, 3 severe). Mean MSTS score was 32 (range: 11–35) and TESS was 89.4 (range: 32.4–100). We grouped cases with lymphoedema grade 0–1 and 2–3. Univariate analysis found significant correlations between the severity of lymphedema and tumor size ≥5 cm (p=0.011), deep location (no patient with a superficial tumor had severe lymphoedema, p=0.001), and radiation dosage 50 vs 66 Gy (p=0.021) but not between upper vs lower extremity (p=0.06).

Conclusion: 9% of STS studied developped significant post-treatment lymphoedema. Large, deep tumors and necessity for 66 Gys were most at risk. This group could be targeted for prophylatic intervention.

Correspondence should be addressed to: COA, 4150 Ste. Catherine St. West Suite 360, Westmount, QC H3Z 2Y5, Canada. Email: meetings@canorth.org