Browsing by Author "Joković, Miloš (9238913900)"

Introduction: Any substance that induces production of free radicals can be a potential cause of brain damage. The aim of our study was to investigate the relationship between some metal ions and oxidative stress biomarkers in the blood of patients with brain tumor and hydrocephalus. Material and methods: Our study included 27 control subjects, 24 patients with brain tumor and 21 patients with hydrocephalus. The activities of superoxide dismutase (CuZn SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR), glutathione S-transferase (GST) and acetyl cholinesterase (AChE), as well as concentrations of reduced glutathione (GSH), lipid peroxides (TBARS) and sulfhydryl groups (SH) were analyzed in the plasma and red blood cells (RBCs) of patients. We also determined the concentrations of Mn, Ni, Co, Cu, Zn, As, Se, Cd, Hg and Fe. Results: The higher activity of SOD and concentration of GSH in both investigated groups could indicate higher oxidative stress. We also observed decreased levels of SH groups in both groups of patients. In both groups of patients we detected decreased concentrations of Ni, Co, Zn and Fe (and Mn in brain tumor patients) and increased concentrations of As, Se and Cd in the blood. Interestingly, we observed a higher concentration of Cd in both plasma and RBCs of hydrocephalus patients compared to the patients with brain tumor. Conclusions: There are strong correlations between some metal ion concentrations and certain oxidative stress biomarkers in the blood of patients, which supports our hypothesis, but the observed trend needs to be further investigated. Copyright © 2018 Termedia & Banach.

Introduction Natural course of aneurysms that occur on blood vessels of the brain singles out the need for understanding the mechanism of the occurrence of aneurysm wall rupture and identification of anatomic characteristics as predictive factors for hemorrhage to occur. Objective In this study we comparatively present results of our researches and experimental models on animals. Methods We made a comparative analysis of anatomical characteristics of blood vessels of the brain and aneurysms obtained on the basis of digital subtraction angiography and intraoperative finding. In this article we review recent research in the anatomic characteristics of intracranial aneurysms and parent blood vessels. We present a series of 185 aneurysms (ruptured and unruptured) dissected at the Neurosurgical Clinic of Clinical Center of Serbia in Belgrade. Results Inclination angle may be considered as the vital predesposing factor for intracranial aneurysm rupture. In aneurysms that ruptured it was 139.748±27.242°, while in unruptured aneurysms it was considerably smaller and amounted to 100.882±22.001° (p<0.01). Conclusion Inclination angle may be regarded as the vital predisposing factor since it differs considerably in unruptured and ruptured aneurysms. Aneurysms with blood stream angle smaller than 115° have very small probability of rupture, while blood stream angle bigger than 150° presents a high risk of rupture.

SUMMARY Introduction The spine is involved in less than 1% of all tuberculosis (TB) cases, and it is a very dangerous type of skeletal TB as it can be associated with neurologic deficit and even paraplegia due to compression of adjacent neural structures and significant spinal deformity. The spine TB is one of the most common causes for an angular kyphotic deformity of spine. Patients with kyphosis angle ≥ 60° at dorsolumbar spine are at great risk to develop late onset neurological deficit and paraplegia due to chronic compression and stretching of the spinal cord over bonny ridges. In a small number of cases, other conditions may lead to neurological deficit in patients with long standing angular kyphosis which also alters the treatment strategy that otherwise involves prolonged and mutilant surgery. Case outline We present a case of a 61-year-old male patient with concomitant 90° dorsolumbar spine kyphosis due to spinal TB and ligamentum flavum hypertrophy which led to spinal canal stenosis with myelopathy, and consequent paraplegia. The patient underwent dorsal decompression with hypertrophic yellow ligament removal after which he recovered to the level of walking. Conclusion Many authors propose guidelines for treatment of spinal TB, taking into account the stage of the disease, the age of the patient, the angle of kyphosis, and other factors. We find that personalized medical approach is the best approach for each patient. © 2020, Serbia Medical Society. All rights reserved.

We are reporting the case of a 53-year old woman presenting to our hospital with a hemorrhagic low-grade glioma (LGG). She was admitted to a nearby general hospital where she had presented with aphasia, right hemiplegia and change of mental status. Computer tomography (CT) images showed a left temporo-parietal hemorrhage with mass effect. She was transferred to our hospital neuro-intensive care unit where emergency craniotomy was performed. A tumor with hematoma was removed and further histopathology analysis revealed tumor progression. We reviewed the literature reporting cases of central nervous system tumors hemorrhage and found that these types of events are exquisitely rare in adults with LGG. However these events are possible, suggesting that it should be included in the differential diagnosis of any patient presenting with intracranial hemorrhage. This case raises questions regarding the benefit of early versus late intervention for patients known to have LGG.

Objective - To examine the possible pathological changes of the trigeminal vasculature in patients with neuralgia. Background - Such a study has never been performed before. The alterations of the trigeminal vessels could have important pathophysiological implications in the trigeminal neuralgia pathogenesis. Methods - The biopsy specimens for the electronmicroscopic (EM) and immunohistochemical examination were taken during a partial rhizotomy in 6 patients with trigeminal neuralgia and in 2 persons with trigeminal neuropathy. In addition, the 32 normal trigeminal nerves were used as the control specimens. Results - The vascular pathological alterations were noticed in 3 out of 6 neuralgia patients. The EM study revealed signs of apoptosis or degeneration, respectively, of some endothelial and smooth muscle cells in the wall of the trigeminal arterioles. The immune reactions against CD31, CD34, and α-smooth muscle actin in these cells were weaker than in the control specimens, but stronger against factor VIII. In addition, the arteriolar basement membranes, which were thickened, showed an intense laminin, fibronectin, and collagen IV immunoreactivity. Similarly, some endothelial cells and pericytes of the intratrigeminal capillaries also showed signs of apoptosis or degeneration, respectively. Their basement membrane was very thick and showed an intense immune reaction against laminin, fibronectin, and collagen IV. Conclusion - The observed pathological changes of the trigeminal vasculature could be the primary factor, while demyelination of the trigeminal nerve fibers could be the secondary process in some patients with neuralgia. © 2007 the Authors.

Objective - To examine the possible pathological changes of the trigeminal vasculature in patients with neuralgia. Background - Such a study has never been performed before. The alterations of the trigeminal vessels could have important pathophysiological implications in the trigeminal neuralgia pathogenesis. Methods - The biopsy specimens for the electronmicroscopic (EM) and immunohistochemical examination were taken during a partial rhizotomy in 6 patients with trigeminal neuralgia and in 2 persons with trigeminal neuropathy. In addition, the 32 normal trigeminal nerves were used as the control specimens. Results - The vascular pathological alterations were noticed in 3 out of 6 neuralgia patients. The EM study revealed signs of apoptosis or degeneration, respectively, of some endothelial and smooth muscle cells in the wall of the trigeminal arterioles. The immune reactions against CD31, CD34, and α-smooth muscle actin in these cells were weaker than in the control specimens, but stronger against factor VIII. In addition, the arteriolar basement membranes, which were thickened, showed an intense laminin, fibronectin, and collagen IV immunoreactivity. Similarly, some endothelial cells and pericytes of the intratrigeminal capillaries also showed signs of apoptosis or degeneration, respectively. Their basement membrane was very thick and showed an intense immune reaction against laminin, fibronectin, and collagen IV. Conclusion - The observed pathological changes of the trigeminal vasculature could be the primary factor, while demyelination of the trigeminal nerve fibers could be the secondary process in some patients with neuralgia. © 2007 the Authors.