Abstract
Abstract BACKGROUND Diffuse gliomas are slow-growing tumors with predilection for deep and eloquent structures such as supplementary motor area and insula. They can reach huge dimensions which is a surgical challenging. OBJECTIVE Describe indications and limitations of neoadjuvant chemotherapy for diffuse gliomas. METHODS Systematic review was performed in November/2019 using Pubmed, Bireme and Cochrane databases. The following combinations were used: “Chemotherapy” AND “neoadjuvant” AND “diffuse glioma”, “Chemotherapy” AND “neoadjuvant” AND “low grade glioma”, “Chemotherapy” AND “preoperative” AND “diffuse glioma”, “Neoadjuvant” AND “Chemotherapy” AND “temozolomide” AND “diffuse glioma”. RESULTS After carefully analysis, 7 papers were selected. They had mixed surgical interventions and used different drugs. In general, it was observed that neoadjuvant Temozolomide for Oligodendrogliomas 1p19q codeleted with MGMT methylation had better response than other molecular groups. Tumor reduction was significant. CONCLUSIONS Quality of life is a main goal in neurooncology. Tumor reduction using chemotherapy is a promising therapeutic. Surgery, especially in eloquent areas, could remove more tumors with less morbidity. Recent publications are using this approach with good outcomes, however further studies with more patients and uniformization are required to stablish this approach.
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