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To determine the frequency of progressive MRI lesions shortly after radiotherapy for glioma with spontaneous improvement or stabilization, the authors studied a cohort of patients treated within two prospective phase III trials with radiotherapy only. In 9 out of 32 patients, the first post radiotherapy MRI showed progressive enhancement. In 3 of these 9 the MRI improved or stabilized for 6 months without additional treatment. The authors conclude that patients with progressive lesions within 3 months after radiotherapy should not be eligible for phase II trials on recurrent glioma.
To determine the frequency of progressive MRI lesions shortly after radiotherapy for glioma with spontaneous improvement or stabilization, the authors studied a cohort of patients treated within two prospective phase III trials with radiotherapy only. In 9 out of 32 patients, the first post radiotherapy MRI showed progressive enhancement. In 3 of these 9 the MRI improved or stabilized for 6 months without additional treatment. The authors conclude that patients with progressive lesions within 3 months after radiotherapy should not be eligible for phase II trials on recurrent glioma.