Int J Radiat Oncol Biol Phys. 1991 Mar;20(3):429-32.

Fraction size in external beam radiation therapy in the treatment of melanoma.

Sause WT, Cooper JS, Rush S, Ago CT, Cosmatos D, Coughlin CT, JanJan N, Lipsett J.

Source

LDS Hospital, Radiation Therapy Center, Salt Lake City, UT 84143.

Abstract

RTOG 83-05 was a prospective randomized trial evaluating the effectiveness of high dose per fraction irradiation in the treatment of melanoma. Retrospective analysis suggested a dose response curve of melanoma to external beam irradiation as the dose per fraction is increased. RTOG 83-05 randomized patients with measureable lesions to 4 x 8.0 Gy in 21 days once weekly to 20 x 2.5 Gy in 26-28 days, 5 days a week. One hundred thirty-seven patients were randomized and 126 patients were evaluable: 62 patients in the 4 x 8.0 Gy arm and 64 patients in 200 x 2.5 Gy arm. Patient characteristics were essentially identical. Stratification was performed on lesions less than 5 cm or greater than or equal to 5 cm. The study was closed on May 31, 1988 when interim statistical analysis suggested that further accrual would not reveal a difference between arms. Response rate overall was complete remission 23.8%, partial remission 34.9%. The 4 x 8.0 Gy arm exhibited a complete remission of 24.2% and partial remission of 35.5%. The 20 x 2.5 Gy arm exhibited a complete remission of 23.4% and partial remission of 34.4%. There was no difference between arms.

PMID:: 1995527; [PubMed - indexed for MEDLINE]

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