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MRI demonstrating a durable response. The patient had a biopsy and treatment of GB anterior and caudal to this lesion. The enhancing area in A appeared and progressed while the patient was receiving BEV, almost a year and a half after first line therapy. The response occurred slowly, over months, while the patient was receiving EP. a T1-post contrast at time of progression on BEV, b T1-post contrast at approximately 45 weeks on EP
