World Neurosurg
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Intracranial carcinoid tumors belong to the class of neuroendocrine tumors and their incidence is extremely rare. The pathogenesis and clinical manifestations of carcinoid tumors of the skull base are outlined in this case report. ⋯ Primary intracranial carcinoid tumors, though rare, should be included in the differential diagnosis of extradural and dural-based lesions.
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Comparative Study
Magnetic resonance imaging diffusion tensor tractography: evaluation of anatomic accuracy of different fiber tracking software packages.
Diffusion tensor imaging (DTI)-based tractography has become an integral part of preoperative diagnostic imaging in many neurosurgical centers, and other nonsurgical specialties depend increasingly on DTI tractography as a diagnostic tool. The aim of this study was to analyze the anatomic accuracy of visualized white matter fiber pathways using different, readily available DTI tractography software programs. ⋯ The results of this study show that there is a statistically significant difference in the anatomic accuracy of the tested DTI fiber tracking programs. Although incorrectly displayed fibers could lead to wrong conclusions in the neurosciences field, which relies heavily on this noninvasive imaging technique, incorrectly displayed fibers in neurosurgery could lead to surgical decisions potentially harmful for the patient if used without intraoperative cortical stimulation. DTI fiber tracking presents a valuable noninvasive preoperative imaging tool, which requires further validation after important standardization of the acquisition and processing techniques currently available.
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Case Reports
Olfactory colloid cyst: case report and review of extraventricular colloid cyst literature.
A rare case of an extraventricular colloid cyst located in the olfactory groove extending downward into the ethmoid sinus is presented. This is the second reported case in the world literature. ⋯ There were no complications, and the patient made a full recovery, with resolution of the cerebrospinal fluid rhinorrhea.
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To assess the frequency of brain metastasis in patients with primary esophageal cancer and to describe the clinical characteristics, diagnosis, and prognosis. ⋯ In this retrospective study of 1612 patients with esophageal carcinoma at a single medical center, 1.61% (26 of 1612) of the patients had a diagnosis of brain metastasis. The prognosis is poor for patients with brain metastasis from esophageal carcinoma. A solitary brain lesion, surgical treatment, and a good Karnofsky Performance Status may indicate a good prognosis.
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Biography Historical Article
Redefining thalamic vascularization vicariously through gerald percheron: a historical vignette.
Gerard Percheron, M. D., a practicing neurologist and prolific researcher at the Institute Nationale de la Sante et de la Recherche Medicale (INSERM), made significant and valuable contributions to medicine, in particular, to the vascular anatomy of the basal ganglia. His particular interest in the thalamus eventually led to the identification of an anatomic variation in its vascular supply. ⋯ Occlusion of the AOP typically causes a simultaneous and symmetric infarction. Treatment efficacy is time-dependent and necessitates thrombolytics and anticoagulative medications. Here, we trace a course from the artery's initial description in 1973 to its current implications in cerebrovascular stroke, and offer a synopsis of the proposed treatment.