Clinical Management of Diffuse Low-Grade Gliomas

SIMPLE SUMMARY: Diffuse low-grade gliomas (LGG) are relatively uncommon primary brain cancers. In recent years, the molecular, diagnostic, and therapeutic approaches have evolved. IDH (isocitrate dehydrogenase) mutations can affect the great majority of these tumors with distinct genetic and clinical characteristics, carrying a more favorable prognosis compared with wild-type IDH. In patients with LGG, the most common manifestation is seizure and new neuroradiological tools are available to improve the diagnostic and therapeutic pathways. Surgical intervention is performed with the goal of maximum safe resection; postoperative chemoradiotherapy showed benefits in selected patients. New treatments based on molecular profiling, new small molecule and immunotherapy approaches could improve survival and quality of life. In this review, in order to identify the optimal clinical management of patients with LGG, we discuss the relevant biological and clinical characteristics, new therapeutic approaches, and future research directions for these tumors. ABSTRACT: Diffuse low-grade gliomas (LGG) represent a heterogeneous group of primary brain tumors arising from supporting glial cells and usually affecting young adults. Advances in the knowledge of molecular profile of these tumors, including mutations in the isocitrate dehydrogenase genes, or 1p/19q codeletion, and in neuroradiological techniques have contributed to the diagnosis, prognostic stratification, and follow-up of these tumors. Optimal post-operative management of LGG is still controversial, though radiation therapy and chemotherapy remain the optimal treatments after surgical resection in selected patients. In this review, we report the most important and recent research on clinical and molecular features, new neuroradiological techniques, the different therapeutic modalities, and new opportunities for personalized targeted therapy and supportive care.