Preliminary evaluation of chemotherapy plus residual tumor excision for testis conservation to provide justification for a randomized trial versus orchidectomy to reduce metabolic syndrome in patients with germ cell cancer
5087 Background: There is evidence that early andropause due to testicular atrophy may be playing a role in the increased metabolic syndrome and cardiac deaths seen with follow up of GCC patients even those on surveillance. In a randomized trial of 1,477 stage I seminomas a single course of carboplatin produced a 78% reduction of contra lateral testicular GC. This, has increased awareness of the effectiveness of chemotherapy on primary tumours This abstract updates our experience.assessing chemo-response of primary GCC in past 30 years. Methods: Testicular GCC patients receiving chemotherapy with primary tumour in situ during 1978–2001 have been reviewed. 62 had advanced disease and 20 had stage I. Results: In 30/82 (37%) the testis normalised and was retained. Median follow-up is 132 months. 7 of these patients developed second GCC. Actuarial 5, 10, and 15 year relapse free survival was 81% and 76%. All relapses are new tumours without evidence of metastasis and are disease free after orchidectomy alone (15, 17, 35, 45, 48, 72, and 156 months). 22 additional patients (28%) who underwent orchidectomy for apparent treatment failure had necrotic tissue/mature teratoma involving less than 50% of the testis and could have been candidates for tumour enucleation. Patients with stage 1 tumours and seminoma histology showed significantly higher preservation rate that approached 100% if one included those showing necrosis or mature teratoma involving less than 50% of the testis. There have been 6 pregnancies to date in wives of 3 patients. 5 of 6 patients studied in detail have recovered sperm, the highest count (100x106) being the only patient who was successfully treated for bilateral testis tumours. Conclusions: This preliminary study suggests that up to 50% of all cases and 90% of stage I seminoma cases with tumours small enough for tumour enucleation for incomplete responders could have successful testis preservation after chemotherapy safely up to 10 years though in the future a randomized patient preference driven trial is needed to establish its acceptability, safety and value in reducing androgen deficiency. No significant financial relationships to disclose.