Introduction: A brain abscess is a serious disease of the central nerve system. We conducted this study to summarize the clinical manifestations and outcomes of brain abscesses. Materials and Methods: A retrospective chart review of pediatric patients diagnosed with brain abscesses from November 2000 to Jаn 2016 was performed at Shastin Medical Hospital neurosurgery department. Results: Twenty-five patients were included in this study. On average, 1.67 cases per year were identified and the median age was 4.3 years. The common presenting clinical manifestations were fever (18/25, 72%), seizure (12/25, 48%), altered mental status (11/25, 44%), and signs of increased intracranial pressure (9/25, 36%). A total of 14 (56%) patients had underlying illnesses, with congenital heart disease (8/25, 32%) as the most common cause. Predisposing factors were identified in 15 patients (60%). The common predisposing factors were otogenic infection (3/25, 12%) and penetrating head trauma (3/25, 12%). Causative organisms were identified in 64% of patients (16/25). The causative agents were S. intermedius (n=3), S. aureus (n=3), S. pneumoniae (n=1), Group B streptococcus (n=2), E. coli (n=1), P. aeruginosa (n=1), and suspected fungal infection (n=5). Seven patients received medical treatment only while the other 18 patients also required surgical intervention. The overall fatality rate was 16% and 20% of patients had neurologic sequelae. There was no statistical association between outcomes and the factors studied. Conclusion: Although uncommon, a brain abscess is a serious disease. A high level of suspicion is very important for early diagnosis and to prevent serious consequences.

Introduction: A brain abscess is aserious disease of the central nerve system.We conducted this study to summarize theclinical manifestations and outcomes ofbrain abscesses.Materials and Methods: A retrospectivechart review of pediatric patients diagnosedwith brain abscesses from November 2000 toJаn 2016 was performed at Shastin MedicalHospital neurosurgery department.Results: Twenty-five patients wereincluded in this study. On average, 1.67cases per year were identified and themedian age was 4.3 years. The commonpresenting clinical manifestations were fever(18/25, 72%), seizure (12/25, 48%), alteredmental status (11/25, 44%), and signs ofincreased intracranial pressure (9/25, 36%).A total of 14 (56%) patients had underlyingillnesses, with congenital heart disease(8/25, 32%) as the most common cause.Predisposing factors were identified in 15patients (60%). The common predisposingfactors were otogenic infection (3/25, 12%)and penetrating head trauma (3/25, 12%).Causative organisms were identified in 64%of patients (16/25). The causative agentswere S. intermedius (n=3), S. aureus (n=3),S. pneumoniae (n=1), Group B streptococcus(n=2), E. coli (n=1), P. aeruginosa (n=1),and suspected fungal infection (n=5). Sevenpatients received medical treatment onlywhile the other 18 patients also requiredsurgical intervention. The overall fatality ratewas 16% and 20% of patients had neurologicsequelae. There was no statistical associationbetween outcomes and the factors studied.Conclusion: Although uncommon, a brainabscess is a serious disease. A high level ofsuspicion is very important for early diagnosisand to prevent serious consequences.

Introduction: According to the World Health Organization (WHO) in 2020, brain and central nervous system (CNS) cancers account for 2% of all newly diagnosed cancers in the world and 1.5% in Mongolia. Approximately 85-90% of all brain and other CNS tumors were diagnosed primary brain tumor. In 2019, the average 5 year survival probability was 50% for other cancers and 11% for the primary brain tumors. There were 28 patients with primary brain tumor and 33 relatively healthy individuals in our study. Goal: To study the diagnostic value of serum aquaporin-4 and glial fibrous acidic protein in the diagnosis of primary brain cancer Material and Methods: The Department of Neurosurgery at Third central hospital included 28 patients with primary brain cancer and 33 relatively healthy people. The study was conducted under the permission of the Medical Ethics Review Committee of the Ministry of Health on June 19, 2019 №119. Serum aquaporin-4 and glial fibrous acidic protein content was determined by the ELISA kits method using the human aquaporin-4 and glial fibrous acid protein test kit of the Chinese company “Sanlong”. The level is assumed to be true if the p value is less than 0.05. Results Mean age of the all participants was 42.9±16.5, 64% female and 36% male. Serum aquaporin-4 protein levels were 175.71±13.3 pg/ml and serum glial fibrilliary acidic protein levels were 2.682±0.218 ng/ml in patient with primary brain tumor. Serum aquaporin-4 protein and glial fibrilliary acidic protein levels were statistically significant high (p<0.001) in patient with primary brain tumor. Serum aquaporin-4 protein and glial fibrilliary acidic protein level differences were statistically significant (p<0.05) in benign and malignant tumor. There was no statistically significant correlation between serum aquaporin-4 and glial fibrillary acidic protein level and primary brain tumor grade.