Background
Hyperthermic isolated limb perfusion (HILP) or isolated limb infusion (ILI) are well-accepted regional chemotherapy techniques for in-transit melanoma of extremity. The role and efficacy of repeat regional chemotherapy for recurrence and which salvage procedure is better remains debatable. We aimed to compare toxicities and clinical outcomes by procedure types and the sequence.
Methods
Data from 44 patients, who underwent repeat HILPs or ILIs from 3 institutions beginning 1997 to 2010, were retrospectively reviewed. Regional toxicity using Wieberdink (WBD) grade, systemic toxicity using serum creatine phosphokinase level (CPK), length of hospital stay (LOS), response rates (RR) at 3 months post-procedure, and time to in-field progression (TTP) were analyzed.
Results
Of 44 pts, 45.5% were male, 54.5% female with a median age of 66 years (range, 29–85) at diagnosis. The median follow-up was 21.4 months (range, 4 – 153). Of 70 ILIs and 28 HILPs, following groups were identified: A) ILI→ILI (n=25); B) ILI→HILP (n=10); C) HILP→ILI (n=12); D) HILP→HILP (n=3). The comparison of WBD, CPK, LOS and RR between procedures (HILP vs. ILI), between sequence (initial vs. repeat) and their interactions showed no significant differences statistically. TTP after initial procedure did not differ between HILP and ILI (p=0.08), and no survival difference was seen (p=0.65) when TTP after repeat procedure was compared.
Conclusions
The majority of patients tolerated repeat regional chemotherapy without increased toxicity or LOS; no statistical difference in clinical outcomes were noted when comparing repeat procedures even though repeat HILPs showed higher complete response compared to repeat ILIs.