The incidence of malignant melanoma continues to rise throughout the world. Approximately 12 in 100,000 Germans are diagnosed with malignant melanoma per year. Malignant melanoma is often very aggressive since it may spread both through the lymphatic system and the bloodstream at an early stage of disease.

While treatment of localized disease is mostly surgical, in patients with extensive disease, prognosis remains poor; the primary standard therapy of metastastic disease comprises dacarbazine (DTIC) eventually combined with other chemotherapeutic agents e.g., cisplatin or BCNU. The duration of response to systemic chemotherapy is generally short and so far, no standard second-line treatment has been established.

To study the potential additional therapeutic effects of regional hyperthermia in advanced malignant melanoma patients with progressive chemotherapy refractory soft tissue metastases, in the present trial, we sought to compine local hyperthermia with concomitant systemic second-line chemotherapy.