نتایج جستجو برای: third ventricle
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When a central nervous system (CNS) lesion is found in patients with chronic lymphocytic leukemia (CLL), the diagnostic possibilities include CNS involvement of CLL, transformation to large B-cell lymphoma (Richter’s syndrome [RS]), or coincidental presence another tumorous non-tumorous disease. RS commonly occurs preexisting CLL other nodal/extra-nodal involvement, but it extremely rare find i...
SUMMARY Hypophyseal triplication is malformation that has not been described previously. We present a child with midline abnormalities who underwent epignathus excision at birth. Brain MR imaging revealed 2 paired lateral pituitary glands and an oval midline gland, each with an independent stalk, connected to a thickened third ventricle floor. Because malformations represent a failure in embryo...
Insulin has been shown to increase sympathetic nerve activity. Because evidence shows that insulin acts within the central nervous system, we hypothesized that lesions of the anteroventral third ventricle region, an area rich in insulin receptors, would abolish sympathetic responses to hyperinsulinemia. We measured mean arterial pressure and lumbar sympathetic nerve activity in fasted, anesthet...
Colloid cysts of the third ventricle are rare benign lesions. We report here an exceptional familial case defined by the evidence of two colloid cysts in two relatives of the first degree, a mother and her daughter in our description. Only 15 cases are reported in the literature. The main differences compared with sporadic cases are an earlier age of discovery and a female predominance. In case...
Many forms of experimental hypertension depend on the integrity of the periventricular tissue surrounding the anteroventral third ventricle. The current investigation examined the extent to which this forebrain area is necessary for the elaboration of salt-induced hypertension in the borderline hypertensive rat. Eight-week-old male rats were given either electrolytic lesions of the anteroventra...
A variety of surgical approaches to the posterior third ventricle and pineal region exist. The choice of approach is influenced by the exact location of the lesion, its expected pathologic findings, and the comfort level of the operating surgeon with the approach that is being considered. For most pineal region masses that are situated in the midline below the deep venous system, we favor the s...
Computed tomographic (CT) studies during life reveal the involutionary changes in the brain found in postmortem studies. Beginning about the fourth decade, gradual widening of the third ventricle, sylvian and interhemispheric fissures, superficial sulci, and basal cisterns occurs. Enlargement of the lateral ventricles is most striking after the sixth decade of life. Regression of the brain with...
Twin studies are important to investigate genetic influences on variation in human brain morphology in health and disease. However, the twin method has been criticized for its alleged non-generalizability due to differences in the intrauterine and family environment of twins, compared with singletons. To test whether twin-singleton differences complicate interpretation of genetic contributions ...
BACKGROUND It remains unclear whether structural brain abnormalities in schizophrenia are caused by genetic and/or disease-related factors. Structural brain abnormalities have been found in nonpsychotic first-degree relatives of patients with schizophrenia, but results are inconclusive. This large magnetic resonance imaging study examined brain structures in patients with schizophrenia, their n...
AIM To evaluate the incidence of anatomical variations and abnormalities of the third ventricle floor encountered during the endoscopic third ventriculostomy (ETV) procedure in myelomeningocele-associated hydrocephalus (MAH) cases. MATERIAL AND METHODS A retrospective analysis was performed on 455 pediatric MAH cases that had been treated with ETV. This case series consisted of the patients w...
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