Outcomes in Patients Treated with Laser Interstitial Thermal Therapy for Primary Brain Cancer and Brain Metastases.

Laser interstitial thermal therapy (LITT) is an emerging modality to treat benign and malignant brain lesions. LITT is a minimally invasive method to ablate tissue using laser-induced tissue heating and serves as both a diagnostic and therapeutic modality for progressive brain lesions. We completed a single-center retrospective analysis of all patients with progressive brain lesions treated with LITT since its introduction at our center in August of 2015. Twelve patients have been treated for a total of 13 procedures, of which 10 patients had brain metastases and 2 patients had primary malignant gliomas. Biopsies were obtained immediately prior to laser-induced tissue heating in 10 procedures (76.9%), of which seven biopsies showed treatment-related changes without viable tumor. After laser ablation, two of three patients previously on steroids were successfully weaned on first attempt. The results of this analysis indicate that LITT is a well-tolerated procedure enabling some patients to discontinue steroids that may be effective for diagnosing and treating radiation necrosis and tumor progression.