
Limb Salvage in Patients with Unresectable Recurrent Melanoma and Sarcoma with the Hyperthermic Isolated Limb Perfusion Technique
Introduction: Hyperthermic Isolated Limb Perfusion (HILP) is a surgical procedure for the regional delivery of heat and high doses of chemotherapy and biologic agents to the extremity. The procedure is employed as a limb salvage technique for locally advanced primary malignancies or recurrent cancers that are unresectable and confined to the extremity
Methods: From 1987-2016, 247 patients with unresectable recurrent melanoma (95%), sarcoma or Merkel Cell Carcinoma underwent HILP for limb salvage of the affected extremity after staging was negative for Stage IV disease and disease was confirmed to be confined to the extremity.
Results: All patients had limb salvage with this protocol. All patients were clinically negative in their regional basin at the time of perfusion, although 40% of the patients had evidence of regional nodal disease following nodal dissections. Immediate responses (within 3 months) on the extremity to the HILP were as follows: complete response (CR) of 66%, partial response (PR) of 20%, 10% stable disease and 4% progressive disease. With a mean follow-up period of 5 years, 61.5% of the patients have recurred with 68.4% of the recurrences being systemic, 21% regional nodal, 7.2% in-transit and 3.3% local-regional soft tissue.
Conclusions: HILP is an effective strategy for limb salvage in patients with unresectable, locally advanced cancers confined to the extremity. The treatment was associated with a high rate of complete responses on the extremity. Most patients recurred with distant metastases emphasizing the need for better systemic therapies for these malignancies.
Synopsis: Patients with recurrent, unresectable melanoma, other cutaneous malignancies and sarcoma confined to an extremity are problematic for clinicians since recurrence rates show that most will have occult systemic disease. An aggressive amputation approach does not make sense and the fact that these patients have active disease makes them ineligible for approved adjuvant therapies. In addition since their clinically apparent active disease is confined to the local/regional soft tissues making them Stage 3 disease, they are not eligible for Stage IV protocols. In these situations Hyperthermic Isolated Limb Perfusion (HILP) effectively treats the extremity with high response rates and a 100% limb salvage rate.
Lauren Kerivan, Michael Reintgen, Eric Reintgen, Steve Shivers and Douglas Reintgen*