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Safety and efficacy of permanent iodine-125 seed implants and carmustine wafers in patients with recurrent glioblastoma multiforme.


Posted on: 02/15/2008

J Neurosurg. 2008 Feb;108(2):236-42.Click here to read Links

Safety and efficacy of permanent iodine-125 seed implants and carmustine wafers in patients with recurrent glioblastoma multiforme.

1 Department of Neurosurgery and, 2 Division of Radiation Oncology, The Neuroscience Institute, University of Cincinnati Medical Center, Cincinnati, Ohio.

Object Effective treatment options are limited for patients with recurrent glioblastoma multiforme (GBM), and survival is usually <1 year. Novel treatment approaches are needed. Localized adjunct treatment with carmustine (BCNU) wafers or permanent, low-activity (125)I seed implants has been shown to be effective for GBM. This study assessed the efficacy and safety of these therapies in combination following tumor resection. Methods Thirty-four patients with recurrent GBM were treated with maximal tumor resection followed by implantation of BCNU wafers and permanent (125)I seeds into the tumor cavity. Patients were followed up with clinical evaluations and magnetic resonance imaging studies once every 3 months. Survival and progression-free survival (PFS) were evaluated. Results During follow-up, local disease progression was observed in 27 patients, and 23 of them died. The median survival period was 69 weeks, and the median PFS was 47 weeks. The 12-month survival and PFS rates were 66 and 32%, respectively. Baseline factors associated with prolonged survival included Karnofsky Performance Scale score >/= 70, (125)I seed activity >/= 0.8 mCi/cm(3) of tumor cavity, and age < 60 years. Brain necrosis developed in 8 patients (24%) and was successfully treated with surgery or hyperbaric oxygen therapy. Conclusions The use of adjunct therapy combining BCNU wafers and permanent (125)I seeds resulted in survival that compares favorably with data from similar studies performed in patients with recurrent GBM. The incidence of brain necrosis appeared to be higher than that expected with either treatment alone, although the necrosis was manageable and did not affect survival. This novel approach warrants further investigation in recurrent and newly diagnosed GBM.

PMID: 18240917 [PubMed - in process]

 


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