Abstract
Introduction: Glioblastoma is a high-grade, aggressive central nervous system tumor with predominantly astrocytic differentiation, characterized by fast invasive growth into the surrounding brain parenchyma and aggressive clinical course. The short life expectancy of patients diagnosed with glioblastoma necessitates the need to maximize their quality of remaining life. One of the most common reasons for quality of life impairment in these patients is the cognitive deficit accompanying the disease. There is a lack of a unified and standardized method for the assessment of cognitive functions in these patients, which meets all the necessary criteria to be convenient and usable in the wide clinical practice. Aim: The aim of the present study is to compare the Montreal cognitive assessment (MoCA) brief screening test with an extended neuropsychological examination to determine its applicability in patients diagnosed with glioblastoma. Material and methods: The study includes 27 patients undergoing neurosurgical intervention for histologically proven IDH-wildtype glioblastoma in the Department of Neurosurgery, “St. Marina” University Hospital – a tertiary healthcare center, for the period January 2019 to December 2022. Preoperatively, patients were examined with the short MoCA screening test and an extended neuropsychological examination including the following subtests: Issac set test, Trail making test A and B, Luria test, Raven‘s color matrices, Stroop test and Bender test. Results: Of all the patients studied, those with a MoCA score below 26 points present at least one negative test of the extended neuropsychological examination. MoCA patients with scores of 26 or more do not demonstrate cognitive impairment in the extended neuropsychological impairment. Conclusion: The obtained results support the claim that the MoCA short screening test is applicable for preoperative diagnosis of cognitive disorders in patients with glioblastoma. Due to the study‘s small sample size, further research is needed to definitively prove this claim.
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