1/644. Multilocular cysticeral and hydatid cysts of the brain: a report of three cases.Three cases of multilocular parasitic brain cysts are presented; two cases of specific form of neurocysticercosis and one case of multilocular hydatid cyst. MRI shows features seen in other cystic lesions of the CNS. In all cases the diagnosis was established by neurosurgical brain biopsy. The authors indicate that the parasitic disease should be taken into consideration in differential diagnosis of tumor-like cystic brain lesions.- - - - - - - - - - ranking = 1keywords = brain (Clic here for more details about this article) |
2/644. role of diffusion-weighted echo-planar MRI in distinguishing between brain brain abscess and tumour: a preliminary report.Our purpose was to evaluate diffusion-weighted (DW) echo-planar MRI in differentiating between brain abscess and tumour. We examined two patients with surgically confirmed pyogenic brain abscess and 18 with metastatic brain tumours or high-grade glioma, using a 1.5 T system. The apparent diffusion coefficient (ADC) of each necrotic or solid contrast-enhancing lesion was measured with two different b values (20 and 1200 s/mm2). All capsule-stage brain abscesses (4 lesions) and zones of cerebritis (2 lesions) were identified on high-b-value DWI as markedly high-signal areas of decreased ADC (range, 0.58-0.70 [(10-3 mm2/s; mean, 0.63)]). All cystic or necrotic portions of brain tumours (14 lesions) were identified on high-b-value DWI as low-signal areas of increased ADC (range, 2.20-3.20 [(10-3 mm2/s; mean, 2.70)]). Solid, contrast-enhancing portions of brain tumours (19 lesions) were identified on high-b-value DWI as high-signal areas of sightly decreased or increased ADC (range, 0.77-1.29 [(10-3 mm2/s; mean, 0.94)]). Our preliminary results indicate that DW echo-planar MRI be used for distinguishing between brain abscess and tumour.- - - - - - - - - - ranking = 2.1428571428571keywords = brain (Clic here for more details about this article) |
3/644. Changing characteristics of a colloid cyst of the third ventricle.We describe extremely unusual radiological characteristics in a colloid cyst of the third ventricle, where the cyst became dense and its size decreased following a cerebrospinal fluid diversion procedure. Such a course of events has been reported in colloid cysts only twice in the literature.- - - - - - - - - - ranking = 11.732789047025keywords = ventricle (Clic here for more details about this article) |
4/644. The Chiari II malformation: lesions discovered within the fourth ventricle.Structural lesions associated with the Chiari II malformation have been identified within the fourth ventricle in 8 patients. During the 42-month period encompassing the operations of the 7 patients treated surgically, only 9 other patients were explored without the discovery of some associated structural lesion. The patients ranged in age from 2 to 26 years. The following lesions were identified: glial or arachnoidal cysts (3 patients), glial or choroidal nodules (3 patients) and subependymoma (2 patients). These lesions were all situated in the roof of the fourth ventricle adjacent to or interspersed with the choroid plexus. Only the cystic lesions were identified by preoperative imaging. In only 1 case did the associated lesion, a 2-cm cyst, seem to contribute to the patient's clinical presentation. Structural lesions of the fourth ventricle associated with the Chiari II malformation are common in patients who are submitted to decompression. These lesions may be dysplasias of developmental origin, or they may be reactive lesions related to chronic compression and ischemia. They do not necessarily required biopsy or excision.- - - - - - - - - - ranking = 16.425904665835keywords = ventricle (Clic here for more details about this article) |
5/644. tourette syndrome associated with unilateral cystic changes in the gyrus rectus.Brain magnetic resonance imaging of an 11-year-old male with tourette syndrome demonstrated multicystic changes predominately in the gyrus rectus of the left frontal lobe. Other brain regions, including the basal ganglia, were normal. He did not have any symptoms of the comorbid conditions associated with tourette syndrome, such as attention-deficit disorder or obsessive-compulsive disorder. The possible neurobiologic connection between tourette syndrome and the gyrus rectus and its interconnecting pathways is discussed.- - - - - - - - - - ranking = 0.14285714285714keywords = brain (Clic here for more details about this article) |
6/644. Cytologic diagnosis of a solitary brain metastasis from papillary carcinoma of the thyroid. A case report.BACKGROUND: Papillary carcinoma of the thyroid metastasizes to the brain in rare instances. In published series and case reports of metastatic papillary thyroid carcinoma, diagnosis of central nervous system (CNS) metastases has been determined by histologic methods. We present a case of papillary carcinoma metastatic to brain diagnosed by cytologic methods. CASE: A 43-year-old female, initially diagnosed at age 12 with papillary carcinoma of the thyroid metastatic to regional lymph nodes and lung, presented with head aches of increasing frequency and severity. A computed tomography scan confirmed a 1-cm nodule in the right inferior frontal lobe of the brain. For clinical reasons, the patient was followed with serial imaging for five years. At age 48 there was significant progression of the CNS disease, and the patient underwent stereotactic biopsy with drainage of cyst fluid. Cytologic examination of the cyst fluid and immunocytochemical studies confirmed the typical features of papillary thyroid carcinoma, including papillary clusters of cells with finely granular chromatin, micronucleoli, nuclear grooves and an associated psammoma body. CONCLUSION: Neurocytology is a useful technique in the examination of cystic lesions of the brain and may be the sole technique for determination of diagnosis.- - - - - - - - - - ranking = 1.1428571428571keywords = brain (Clic here for more details about this article) |
7/644. Interventional magnetic resonance imaging guided aspiration and biopsy of a cystic midbrain tumor.Interventional magnetic resonance imaging defines the intraoperative application of magnetic resonance imaging technology, permitting the surgeon to work in an open magnetic field. The application of this technology to pediatric neurosurgery allows precise intraoperative localization of pathology, real-time assessment of the anatomical consequences of surgical and anesthetic interventions, accountability of brain shifts, confirmation of the exact site of biopsy or completeness of lesion removal, and immediate identification of some intraoperative and early postoperative complications. We present the case of a young boy with a cystic left midbrain tumor who underwent interventional magnetic resonance imaging guided aspiration and biopsy to illustrate the surgical advantages of this technology.- - - - - - - - - - ranking = 0.85714285714286keywords = brain (Clic here for more details about this article) |
8/644. Rare occurrence of intracerebellar colloid cyst. Case report.colloid cysts are rare intracerebral lesions that are preferentially encountered within the third ventricle. There are only a few reports in which colloid cysts are described in other locations such as the fourth ventricle. A symptomatic intracerebellar colloid cyst in a 45-year-old woman is described. The patient presented with headache, gait disturbance, and nausea. Neuroradiological imaging revealed compression of the fourth ventricle, hydrocephalus, and an intracerebellar cystic lesion measuring 4 x 5 cm that had a small peripheral solid portion. The cyst was successfully removed via a paramedian suboccipital approach. Postoperatively, the patient recovered quickly. The findings in the present report represent an additional example of the broad spectrum of cystic lesions encountered in the cerebellum.- - - - - - - - - - ranking = 7.1062502134681keywords = ventricle, cerebral (Clic here for more details about this article) |
9/644. Ruptured distal anterior choroidal artery aneurysm presenting with casting intraventricular haemorrhage.This report describes a rare case of a distal anterior choroidal artery aneurysm which developed intraventricular haemorrhage without subarachnoid haemorrhage as shown on computerized tomographic (CT) scan. A 69-year-old hypertensive man suddenly became unconscious. An emergency CT scan showed a severe intraventricular haemorrhage and a small round low-dense lesion within the haematoma at the right trigone. The haematoma with obstructive hydrocephalus made the lateral ventricles larger on the right than on the left. CT scan could not detect any subarachnoid haemorrhage. Right interal carotid angiography revealed a saccular aneurysm at the plexal point of the right anterior choroidal artery. We approached the aneurysm and the small round lesion through the trigone via a right temporo-occipital corticotomy. We could clip the aneurysmal neck and remove the intraventricular haematoma and the papillary cystic mass (corresponding to the small round lesion on CT scan) totally in one sitting. Histological examination revealed the aneurysm to be a true one and the papillary cystic mass to be a choroid plexus cyst.- - - - - - - - - - ranking = 13.572213745696keywords = ventricle, intraventricular (Clic here for more details about this article) |
10/644. Evaluation and management of benign, non-congenital tongue masses in children.Lingual tumors are rare, primarily benign, lesions in the pediatric population. Congenital lesions, such as hemangiomas, lymphatic malformations, dermoids, hamartomas and thyroglossal ducts cysts, are seen more commonly. Primary, non-congenital lingual neoplasms are less common in children. We present three patients with benign lingual neoplasms. Evaluation, management, pathology and follow-up are discussed.- - - - - - - - - - ranking = 2.2542229371104keywords = neoplasm (Clic here for more details about this article) |
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