Abstract
Based on the reports of substantial improvement in the response rate w ith the addition of tamoxifen to a multiagent chemotherapy regimen for metastatic melanoma, Southwest Oncology Group (SWOG)-8921 was initiated. A prior regimen (SWOG-8804) of dacarbazine (DTIC) 750 mg/m(2) i.v. day 1 and cisplatin 100 mg/m(2) day 1 repeated every 3 weeks produced a 13% response rate in patients with metastatic melanoma without brain metastasis. SWOG-8921 using identical chemotherapy and schedule added tamoxifen 10 mg twice daily. There were 55 eligible patients registered, median age 52, with 37 men and 18 women. Fifty (91%) patients had evidence of visceral metastasis at registration. There were 10 responders (2 complete and 8 partial responses) for an 18% response rate (95% CI, 9-31%). The response rate in women was 28% (95% CI, 10-53%; in men, 14% (95% CI, 5-29%). Tamoxifen has produced a small increase in the response rate when added to the present combination and schedule of chemotherapy. Further Phase III trials will be necessary to assess whether there is a statistical advantage to the use of tamoxifen when combined with chemotherapy and whether there are statistical differences between men and women.
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