Introduction: Isolated limb perfusion (ILP) is a treatment option most commonly used in the treatment of melanoma in-transit metastases of the extremities. The principle idea is to surgically isolate a region of the body and then deliver a high concentration of a chemotherapeutic agent together with hyperthermia. There have been three randomised trials exploring whether adjuvant ILP to patients with recurrent or high-risk primary melanomas increases survival; one of these trials has now been updated with a 25-year follow-up.
Methods: The original study randomised 69 patients (between 1981 and 1989) with their first satellite or in-transit recurrence to either wide excision (WE group, n = 36 patients) or to WE and adjuvant ILP (WE + ILP group, n = 33 patients). Follow-up data 25 years later concerning survival and cause of death was retrieved from the Swedish National Cause of Death Register.
Results: In the WE + ILP group there were 20 deaths (61%) due to melanoma compared with 26 deaths (72%) in the WE group (p = 0.31). Median melanoma-specific survival was 95 months for WE + ILP compared to 38 months for the WE group, an almost 5 year benefit without statistical significance (p = 0.24).
Discussion: There is no evidence that adjuvant ILP prolongs survival in patients with high-risk or recurrent melanoma; however, the existing randomised trials are largely underpowered to detect such a difference. New studies are exploring systemic immunological effects of ILP, and a combination of regional therapy and immunotherapy may serve as a rationale for new trials using ILP in the future.
Keywords: Adjuvant treatment; Isolated limb perfusion; Melanoma; Randomized trial.