Isolated perfusion for regional chemotherapy is only practical for tumorsIdeated on the extremity, because this is the only site where adequate vascular occlusion can be achieved. Indications for perfusion in clinical stage I melanoma patients are determined by mierostaging of the tumor. At our institution, patients with Clark's levels III, IV, or V and a Breslow thickness of >--1.5 mm are eligible. Lower limb perfusions are started through an iliac perfusion. Two perfusions are performed for foot lesions, local recurrences, satellitosis, or intransit metastases.Flow rates for leg perfusion vary from 600 to 1,000 ml/min. During the past few years, higher flows (up to about 1,200 ml/min) have been utilized.
Less toxicity developed with better tissue perfusion, and the dosage of cytostatics could be increased. The dosage of cytostatic drugs is calculatedby limb volume, as determined by immersion in water. In our opinion, hyperthermia yields superior results for eases of local recurrence or intransit metastases. It is not known if a combination of cytostatic drugs might improve results compared to a single drug.The principle of regional perfusion using cytostatic drugs resuited from a study by Klopp et al. [l] in 1950, who found that pain was alleviated and tumor size reduced when small doses of nitrogen mustard (chlormethine) were injected into the regional arterial blood flow. The best results were obtained when venous return from the area involved was blocked. In 1959, Creech et al. [2] combined this procedure with extracorporeal circulation, using a pump oxygenator, which made it possible to administer large doses of nitrogen mustard continuously.In 1960, Stehlin et al.[3] reported 116 regional perfusions performed at the M.D. Anderson Hospital in Houston, Texas, U.S.A. The majority of patients had tumors of the extremities; the remainder had tumors of the pelvic region and the head and neck area. Luck discovered that melphalan (L-phenylalanine mustard) was the most active agent to inhibit the growth of malignant melanoma in mice; this has since been the agent of choice in perfusions [4]. In 1967, Cavaliere et al. [5] laid the foundation for perfusions under hyperthermia when he described the susceptibility of cancer cells to high temperatures.Favorable results with regional limb perfusion of the extremities have been reported by numerous investigators [6--25]. Perfusion of melanomas located in other parts of the body is not possible, however, because leakage to the systemic circulation