Abstract
Whole-brain radiotherapy and stereotactic radiosurgery (SRS) play a central role in the treatment of metastatic brain tumors. Radiation necrosis occurs in 5% of patients and can be very difficult to treat. The available treatment options for radiation necrosis include prolonged high-dose corticosteroids, hyperbaric oxygen, anticoagulation, bevacizumab, and surgical resection. We present the first report and results using laser-interstitial thermal therapy (LITT) for medically refractory radionecrosis. A 74-year-old diabetic patient who had a history of non-small cell lung cancer with brain metastases and subsequent treatment with SRS, presented with a focal lesion in the left centrum semiovale with progressively worsening edema. Image findings were consistent with radiation necrosis that was refractory despite prolonged, high-dose steroid therapy. His associated comorbidities obviated alternative interventions and the lesion was not in a location amenable to surgical resection. We used laser thermal ablation to treat the biopsy-proven radionecrosis. The procedure was tolerated well and the patient was discharged 48 hours postoperatively. Imaging at 7-week follow-up showed near complete resolution of the edema and associated mass effect. Additionally, the patient was completely weaned off steroids. To our knowledge this is the first report using LITT for the treatment of focal radiation necrosis. LITT may be an effective treatment modality for patients with medically refractory radiation necrosis with lesions not amenable to surgical decompression.
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