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The management of high-grade gliomas is challenging considering their infiltrative nature, involvement of the eloquent cortex, and high recurrence rate. Photodynamic therapy (PDT) is an emerging modality that selectively destroys tumour cells while preserving normal brain tissue. Its safety, and the concurrent use with surgery, radiation, and chemotherapy, is some of its appealing tenets. Here, we present a review of the literature regarding the mechanism, safety, and efficacy of PDT. Keywords: brain tumour, glioma, adjuvant treatment