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Clinical management of grade III oligodendroglioma

Authors Simonetti G, Gaviani P, Botturi A, Innocenti A, Lamperti E, Silvani A

Received 28 April 2015

Accepted for publication 14 June 2015

Published 27 July 2015 Volume 2015:7 Pages 213—223

DOI https://doi.org/10.2147/CMAR.S56975

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Professor Kenan Onel

G Simonetti, P Gaviani, A Botturi, A Innocenti, E Lamperti, A Silvani

Neurooncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy

Abstract: Oligodendrogliomas represent the third most common type of glioma, comprising 4%–15% of all gliomas and can be classified by degree of malignancy into grade II and grade III, according to WHO classification. Only 30% of oligodendroglial tumors have anaplastic characteristics. Anaplastic oligodendroglioma (AO) is often localized as a single lesion in the white matter and in the cortex, rarely in brainstem or spinal cord. The management of AO is deeply changed in the recent years. Maximal safe surgical resection followed by radiotherapy (RT) was considered as the standard of care since paramount findings regarding molecular aspects, in particular co-deletion of the short arm of chromosome 1 and the long arm of chromosome 19, revealed that these subsets of AO, benefit in terms of overall survival (OS) and progression-free survival (PFS), from the addition of chemotherapy to RT. Allelic losses of chromosomes 1p and 19q occur in 50%–70% of both low-grade and anaplastic tumors, representing a strong prognostic factor and a powerful predictor of prolonged survival. Several other molecular markers have potential clinical significance as IDH1 mutations, confirming the strong prognostic role for OS. Malignant brain tumors negatively impacts on patients' quality of life. Seizures, visual impairment, headache, and cognitive disorders can be present. Moreover, chemotherapy and RT have important side effects. For these reasons, “health-related quality of life” is becoming a topic of growing interest, investigating on physical, mental, emotional, and social well-being. Understanding the impact of medical treatment on health-related quality of life will probably have a growing effect both on health care strategies and on patients.

Keywords: anaplastic oligodendroglioma, radiotherapy, chemotherapy, molecular markers, treatments toxicity

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