Brain Cancer Research Today is a free monthly online journal that collates and summarizes the latest research about Brain Cancer, including details on symptoms, benign and malignant tumors, gliomas, treatment.

Current clinical results of the Tsukuba BNCT trial.

Yamamoto T, Matsumura A, Nakai K, Shibata Y, Endo K, Sakurai F, Kishi T, Kumada H, Yamamoto K, Torii Y

Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba, Tenno-dai 1-1-1, Tsukuba City, Ibaraki 305-8575, Japan.

Nine high grade gliomas (5 glioblastomas and 4 anaplastic astrocytomas) were treated with BSH-based intaoperative boron neutron capture therapy (IOBNCT). BSH (100 mg/kg body weight) was intravenously injected, followed by single fraction irradiation using the mixed thermal/epithermal beam of Japan Research Reactor 4. The blood boron level at the time of irradiation averaged 29.9 (18.8-39.5)microg/g. The peak thermal neutron flux as determined by post-irradiation measurements varied from 1.99 to 2.77x10(9) n cm(-2)s(-1). No serious BSH-related toxicity was observed in this series. The interim survival data in this study showed median survival times of 23.2 months for glioblastoma and 25.9 months for anaplastic astrocytoma, results which are consistent with the current conventional radiotherapy with/without boost radiation. Of the 4 residual tumors, 2 showed complete response (CR) and 2 showed partial response (PR) within 6 months following BNCT. No linear correlation was proved between the dose and the occurrence of early neurological events. The maximum boron dose of 11.7-12.2 Gy in the brain related to the occurrence of radiation necrosis. The clinical application of a mixed thermal/epithermal beam and JRR-4 facilities on BSH-based IOBNCT proved to be safe and effective in this series.

Published 13 August 2004 in Appl Radiat Isot, 61(5): 1089-93.
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