Efficacy of repeat isolated limb perfusions with tumor necrosis factor α and melphalan for multiple in-transit metastases in patients with prior isolated limb perfusion failure

Background: Isolated limb perfusion (ILP) is an effective treatment modality for multiple in-transit melanoma metastases confined to the limb. Recurrences after I LP, however, occur in approximately 50% of patients and are a challenge for further treatment. The efficacy of repeat ILPs to prolong local control in this patient category is evaluated in this article. Methods: We used a prospective database in a tertiary referral center. Out Of 100 tumor necrosis factor (TNF)-based ILPs with TNF and melphalan (TM-ILPs) in melanoma patients between March 1991 and July 2003, 25 repeat ILP procedures were performed in 21 patients in whom prior ILP treatment failed. All patients had bulky and/or numerous lesions and were treated with mild hyperthermic TM-ILP by using 2 to 4 mg of TNF and 10 to 13 mg/L of limb volume for the leg and arm, respectively. Results: The complete response rate was 76%, a partial response occurred in 20%, and no change was recorded in 4%. There was no difference in the complete response rate or local toxicity between first and repeat perfusions. Local recurrence occurred in 72%; the median time to local progression was 14 months. The 5-year survival rate was 47%, which compares favorably with known survival rates of stage IIIA/AB patients. The median follow-up of the patients was 26 months. Conclusions: Patients who experience treatment failure after previous ILP treatment respond very well to repeat perfusion, and prolonged local control can thus be obtained. The subgroup of patients qualifying For repeat ILP represents a relatively favorable biological behavior of the melanoma.