Laser Interstitial Thermal Therapy in Neuro-Oncology

Laser Interstitial Thermal Therapy (LITT) is a minimally invasive neurosurgical modality that employs stereotactically guided laser energy to induce controlled hyperthermia and ablation of intracranial tumours. Under continuous magnetic resonance thermometry, an optical fibre is inserted directly into the lesion, allowing real-time measurement of temperature distributions and precise modulation of thermal dose. Initially adopted for deep-seated or surgically inaccessible lesions, LITT has been extended to high-grade gliomas, metastatic deposits, radiation necrosis and selected epileptogenic foci. Advances in computational bioheat modelling, probe design and closed-loop temperature controllers have refined treatment planning and intra-procedural safety. Clinically, LITT offers rapid lesion debulking, shortened hospital stays and the potential to transiently disrupt the blood–brain barrier, thereby enhancing the delivery of systemic therapies. As a complement to resection, radiotherapy and pharmacotherapy, LITT is emerging as a versatile tool in the global management of complex neuro-oncological conditions.

Research from Nature Portfolio

Recent studies have demonstrated the feasibility of automated temperature regulation during MR-guided LITT by integrating rapid volumetric magnetic resonance thermometry with a proportional–integral–derivative controller. In vivo experiments on a clinical 1.5 T scanner achieved eight-slice volumetric imaging per second and maintained target tissue temperatures within 0.5–1.4 °C of set profiles over prolonged heating intervals. This closed-loop system offers enhanced safety and consistency, reducing the risk of thermal injury to adjacent structures and illustrating a clear pathway toward routine clinical implementation of real-time feedback control in neurosurgical ablation.

Laser Interstitial Thermal Therapy in Neuro-Oncology publication trend

The graph below shows the total number of articles in laser interstitial thermal therapy in neuro-oncology across all publications each year (not limited to Nature Index journals).

Technical terms

Laser Interstitial Thermal Therapy (LITT): A stereotactic, minimally invasive procedure that delivers laser energy to brain lesions under magnetic resonance guidance to induce controlled thermal ablation. Magnetic Resonance Thermometry (MRT): An imaging technique using proton-resonance frequency shifts to measure tissue temperature changes in real time during thermal therapies. Bioheat Transfer Model: A mathematical framework based on Pennes’ equation that describes heat conduction, perfusion and thermal damage in biological tissues. Blood–Brain Barrier (BBB): A selective endothelial barrier that regulates molecular and cellular passage between the bloodstream and the central nervous system. Proportional–Integral–Derivative (PID) Controller: A feedback algorithm that automatically adjusts an input (e.g., laser power) to maintain a target variable (e.g., temperature) within predefined limits.

References

1. Development of a Treatment Planning Framework for Laser Interstitial Thermal Therapy (LITT). Cancers (2023).
2. Real-time automatic temperature regulation during in vivo MRI-guided laser-induced thermotherapy (MR-LITT). Scientific Reports (2023).
3. Efficacy of laser interstitial thermal therapy for biopsy-proven radiation necrosis in radiographically recurrent brain metastases. Neuro-Oncology Advances (2023).
4. Efficacy of laser interstitial thermal therapy (LITT) for newly diagnosed and recurrent IDH wild-type glioblastoma. Neuro-Oncology Advances (2022).
5. Hyperthermic Laser Ablation of Recurrent Glioblastoma Leads to Temporary Disruption of the Peritumoral Blood Brain Barrier. PLOS ONE (2016).