Thirty‐five patients with malignant brain tumors (23 with primary brain tumors and 12 with brain metastases) progressing after cranial irradiation chemotherapy received cisplatin, 60 to 120 mg/m2, into the internal carotid artery by a transfemoral approach. Courses of therapy were repeated every 4 weeks. Therapeutic evaluation was performed monthly using the CT scan of the brain and clinical neurologic examination. Thirty patients were evaluable for response. Of 20 evaluable patients with primary malignant brain tumors, 6 responded to therapy and 5 had stable disease. The median time to tumor progression for responding patients was 33 weeks, for stable patients 16 weeks, and 13 weeks for all patients. Five of 10 evaluable patients with brain metastases responded to intracarotid cisplatin, and 2 patients had stable disease. The estimated median time to progression for responding patients was 30+ weeks and 12+ weeks for patients with stable disease. Side effects included seizures in 5 courses, mental agitation and motor restlessness in 1, and transient hemiparesis in 7. One patient may have had a drug‐related death, and one patient appeared to develop encephalopathy after treatment. Five patients had clinical deterioration in vision; in two patients it was bilateral. Intracarotid cisplatin has definite activity in patients with malignant primary brain tumors and in patients with brain metastases. The recommended starting dose for intracarotid cisplatin is 60 to 75 mg/m2. At this dose level side effects are uncommon, but includes the risk of neurologic and retinal toxicity.

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