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This report reviews 48 patients who from 1979 to 1994 were treated at the Norwegian Radium Hospital for newly diagnosed noncerebral extragonadal malignant germ cell tumour (EGGCT). Based on histology and/or serum tumour markers, 12 patients had a seminoma and 36 a non-seminoma. At diagnosis, 33 and 15 patients were classified as having abdominal and mediastinal EGGCT respectively. At the time of diagnosis 13 patients, all with non-seminomatous tumours, had metastases to bone, liver or brain. One patient with abdominal seminoma was cured by radiotherapy alone, whereas cisplatin-based chemotherapy (with or without surgery) was planned in the 47 remaining patients. Twenty-seven out of 42 patients receiving four or more chemotherapy cycles were rendered tumour free by induction chemotherapy, including 5 of the 13 patients with extralymphatic non-pulmonal disease. An additional tumour-free patient died of septicaemia after only two cycles of chemotherapy. Late relapses (after &gt; 2 years) were observed in three patients, and a testicular primary was diagnosed during follow-up in three cases. Seven patients died of treatment-related complications, five of these because of neutropenic septicaemia. The median age of these patients was 52 years compared with 35 years in the remaining 41 patients (P &lt; 0.05). The 5-year overall survival for all 48 patients was 60% (95% CI 46-74%) [cancer-specific 5-year survival 71% (95% CI 50-92%)]. EGGCT is a potentially curable disease, even in patients with very advanced disease. Special attention should, however, be devoted to patients above the age of 40 years because of an increased risk of treatment-related side-effects. Late relapses and the subsequent development of testicular tumours indicate the need for long-term follow-up.

Treatment and outcome of patients with extragonadal germ cell tumours - the Norwegian Radium Hospital's experience 1979-94