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Therapy for patients with high grade astrocytoma using intraarterial chemotherapy and radiation therapy
S Madajewicz1, N Chowhan, A Tfayli
1Division of Neoplastic Diseases, University Hospital Medical Center, Stony Brook, New York 11794-8174, USA.
Background:
High grade astrocytomas account for approximately 40% of all primary brain tumors. The median survival is approximately 8-10 months for patients with glioblastoma multiforme and 36 months for patients with anaplastic astrocytoma. The results of systemic chemotherapy in the treatment of brain tumors have been reported to be less than satisfactory, mainly because of the blood-brain barrier impermeability for chemotherapeutic drugs. Intraarterial chemotherapy has been an attractive alternative with which to overcome this problem.
Methods:
Eighty-three patients with high grade astrocytoma (glioblastoma multiforme [63 patients] and anaplastic astrocytoma--[20 patients]) were treated with intraarterial (intracarotid and/or intravertebral) chemotherapy and radiation therapy between 1987 and 1997. Patients received cisplatin, 60 mg/m2, and etoposide, 40 mg/m2. Radiation therapy was delivered either after completion of the chemotherapy or concomitantly with the chemotherapy.
Results:
Thirty-four of 71 evaluable patients with high grade astrocytoma (48%) responded to the chemotherapy. The median survival for patients with glioblastoma multiforme who received chemotherapy prior to radiation therapy was 20 months versus 7 months for those patients who underwent concomitant chemotherapy/radiation therapy. Patients with anaplastic astrocytoma who received chemotherapy prior to radiation therapy had a median survival of 45 months compared with 12 months for patients who received concomitant chemotherapy/ radiation therapy. The toxicity profile has been reported to be mild and well tolerated.
Conclusions:
Intraarterial chemotherapy for patients with glioblastoma multiforme, delivered prior to radiation therapy, appears to result in a median survival three times longer than that achieved with concomitant chemotherapy/radiation therapy. In addition, patients appear to survive substantially longer than they do after radiation therapy with the addition of systemic chemotherapy. Side effects are reported to be acceptable.
