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OBJECTIVE  There is a paucity of studies assessing the use of MR-guided laser interstitial thermal therapy (LITT), specifically in the elderly population. The aim of this study was to evaluate the safety of LITT for brain tumors in geriatric patients.    METHODS  Geriatric patients (≥ 65 years of age) treated with LITT for intracranial tumors at a single institution between January 2011 and November 2019 were retrospectively identified. The authors grouped patients into two distinct age cohorts: 65–74 years (group 1) and 75 years or older (group 2). Baseline characteristics, operative parameters, postoperative course, and morbidity were recorded for each patient.    RESULTS  Fifty-five geriatric patients underwent 64 distinct LITT procedures for brain tumors. The majority of lesions (40 [62.5%]) treated were recurrent brain metastases or radiation necrosis. The median modified frailty index was 0.1 (low frailty; range 0–0.4) for patients in group 1 and 0.2 (intermediate frailty; range 0–0.4) for patients in group 2 (p &gt; 0.05). The median hospital length of stay (LOS) was 1 day (IQR 1–2 days); there was no significant difference in LOS between the age groups. The hospital stay was significantly longer in patients who presented with a neurological symptom and in those who experienced a postoperative complication. The majority of patients (43 [68.3%] of 63 cases) were fit for discharge to their preoperative accommodation following LITT. The rate of discharge to home was not significantly different between the age groups. Those discharged to rehabilitation facilities were more likely to have presented with a neurological symptom. Nine patients (14.1% of cases) were found to have acute neurological complications following LITT, with nearly all patients showing complete or partial recovery at follow-up. The 30-day postoperative mortality rate was 1.6% (1 case). The complication and 30-day postoperative mortality rates were not significantly different between the two age groups.    CONCLUSIONS  LITT can be considered a minimally invasive and safe neurosurgical procedure for the treatment of intracranial tumors in geriatric patients. Careful preoperative preparation and postoperative care is essential as LITT is not without risk. Appropriate patient selection for cranial surgery is essential, because neurosurgeons are treating an increasing number of elderly patients, but advanced age alone should not exclude patients from LITT without considering frailty and comorbidities.

Magnetic resonance–guided laser interstitial thermal therapy for brain tumors in geriatric patients