Tentorial meningioma on follow-up presenting with sudden deterioration due to intra- and peritumoral hemorrhage.

Almost all meningiomas presenting with intracranial hemorrhage in the literature were admitted with symptoms relating to the hemorrhage and there were no prehemorrhage scans which demonstrated the actual size and apperance of the meningioma. This is a very rare report of a case with a tentorial meningioma documented with pre- and posthemorrhage scans.

Challenging diagnosis: oligodendroglioma versus extraventricular neurocytoma.

Diagnosis of oligodendroglioma from other clear cell neoplasms of central nervous system (CNS) is still challenging despite advances in neuroradiology and molecular diagnostic tools. Herein, we present a 44-year-old male patient who had a diagnosis of right parietal oligodendroglioma grade II in 1994 which recurred in 2002. He presented with intratumoral hemorrhage and he underwent radical resection of tumor in 2003. Histopathological examination of the recurrent tumor showed anaplastic progression with confusing immunohistochemical (IHC) results; the tumor was positive for NeuN and synaptophysin staining. The question arisen was whether the recurrent tumor was an oligodendroglioma with neuronal differentiation or an extraventricular neurocytoma initially misdiagnosed as oligodendroglioma. Repeated IHC staining showed negative results for NeuN and synaptophysin. Chromosomal analysis revealed 1p/19q deletion, which led to the diagnosis ofanaplastic oligodendroglioma grade III. Accurate diagnosis of oligodendroglioma is crucial due to recent advances and promises in its treatment. Current diagnostic methods of oligodendroglial tumors are discussed in context of differentiating oligodendrogliomas from other clear cell neoplasms of CNS, especially from extraventricular neurocytomas.

Cauda-filar paraganglioma with 'silk cocoon' appearance on spinal angiography.

'Silk cocoon' appearance on spinal angiography is pathognomonic to differentiate paragangliomas from several vascular tumors and malformations of cauda-filar region.

Anterior cervicothoracic meningocele treated by cystopleural shunt. Case report and review of the literature.

Anterior meningocele is a rare disease which is commonly observed in the sacral region. Anterio cervicothoracic meningocele is generally diagnosed in adult age and there are few reports in infancy. Different treatment procedures are performed such as ligation, resection and wrapping. The case of a 9-month-old male infant with acute respiratory distress and cyanosis is described. He had also recurrent lung infections for 3 months. The magnetic resonance imaging revealed an anterior cervicothoracic meningocele which was compressing the lung, aorta, esophagus and trachea associated with skeletal abnormalities and C2 - C7 syringohydromyelia. There was no evidence of neurofibromatosis. He was submitted to thoracotomy and treated with cystopleural shunt without valve system. Postoperatively his respiratory distress improved dramatically. Radiologically, the size of meningocele decreased and the syringomyelic cavity disappeared. There was no evidence of recurrence during his followup. Cystopleural shunt procedure is a reliable, simple and effective treatment modality in anterior cervicothoracic meningocele cases. This treatment regimen prevents possible neural damage and also treatments to the associated anomalies such as syringohydromyelia.

A glioma with an arteriovenous malformation: an association or a different entity?

A 58-year-old male was admitted with headache to our neurosurgery clinic. His neurological examination revealed slight left hemiparesis. The radiological evaluation with contrast administred magnetic resonance imaging (MRI) scan demonstrated a right temporo-parietal ring enhancing mass lesion surrounded by edema which was resembling a typical glioma (Fig. 1). The patient was operated on via a temporo-parietal craniotomy and an arteriovenous malformation surrounded by abnormal glial tissue was observed during the exposure. A nidus supplied by several branches arising from the middle cerebral artery (MCA) was obvious. The venous drainage of the malformation was to the superficial venous system. The observed arterial feeders and the draining vein were coagulated and the nidus was macroscopically totally excised. The frozen examination from surrounding glial tissue revealed a high grade glioma. The tumor was also macroscopically totally excised. Postoperatively, the cerebral angiogram demonstrated a right temporal arteriovenous malformation with a centrally excised nidus. The remaining major feeders involved the angular gyrus and the posterior temporal arteries. The venous drainage was to the straight and sigmoid sinuses (Fig. 2). The final histopathological examination of the specimen revealed an arteriovenous malformation surrounded by a high grade glioma (Fig. 3). The patient refused a second operation for total removal of the AVM. Postoperatively, he is doing well with improvement of his left hemiparesis.

Transtentorial approach to the posterior temporomedial structures.

The supracerebellar transtentorial (SCTT) approach, a modification of the infratentorial supracerebellar approach, facilitates simple and minimally invasive access to posterior temporomedial structures without requiring retraction of the temporal or occipital lobe. The SCTT approach was used in 16 patients over a 3-year period. Eleven patients harbored tumors confined to, or located mainly within, the posterior hippocampal formation, three patients harbored aneurysms (one ruptured posterior cerebral artery [PCA] aneurysm at the P2-P3 junction, one ruptured giant PCA [P2] aneurysm, and one giant basilar artery-superior cerebellar artery aneurysm), one patient had juvenile-type moyamoya disease, and one patient suffered from medically intractable epilepsy. In these patients, the SC

Calvarial metastasis of a paraganglioma. Case report and review of the literature.

BACKGROUND: Metastasis of a paraganglioma (PRG) to the calvarium is very rare. In this paper, the case of a 25-year-old male with metastasis of a PRG to the frontoparietal bone is described. CASE DESCRIPTION: The patient presented with bulging on the left side of the head, headache, and weight loss. Magnetic resonance imaging (MRI) revealed a mass lesion in the left frontoparietal region that had destroyed both the external and internal table of the bone, extending under the skin and above the dura mater. After a frontoparietal craniotomy the tumor was removed totally. Histopathological examination revealed the "Zellballen," which are pathognomonic for a PRG. Systemic examination and radiological investigation revealed no primary tumor source. CONCLUSION: Metastasis of a PRG to the calvarium is possible; radical removal of the tumor will provide a cure.

Application of syringosubarachnoid shunt through key-hole laminectomy. Technical note.

The authors describe the key-hole laminectomy technique (KHLT) for application of syringosubarachnoid shunts. This technique was used in 29 patients with noncommunicating syringomyelia. In all cases the shunts were inserted successfully without any peri- or late postoperative complications. The late follow-up magnetic resonance examinations revealed the clear collapse of syrinx in all cases. The authors advocate use of the KHLT because it is associated with less surgery-related trauma, epidural fibrosis, infection, and spinal instability.

Subtonsillar-transcerebellomedullary approach to lesions involving the fourth ventricle, the cerebellomedullary fissure and the lateral brainstem.

We describe the use of the subtonsillar-transcerebellomedullary approach to laterally placed fourth ventricle and brain-stem lesions. The subtonsillar-transcerebellomedullary approach to the fourth ventricle and the lateral brainstem was used in six patients: three patients with tumours of the fourth ventricle and brainstem (two ependymomas and one papillary thyroid carcinoma metastasis), two patients with cavernous angiomas of the brainstem and one patient with a distal posterior inferior cerebellar artery (PICA) aneurysm. The microsurgical anatomy of this approach was studied in five cadaveric head specimens. The tumours and cavernous angiomas were removed and the distal PICA aneurysm was clipped successfully. In all patients the Karnofsky performance scale (KPS) was equal to or better than the preoperative status on follow-up examinations. The anatomical studies also revealed the extensive exposure provided with this approach. The subtonsillar-transcerebellomedullary approach is recommended for lesions occupying the cerebellomedullary fissure, and the lateral aspect of the fourth ventricle.

Civilian gunshot wounds to the head.

BACKGROUND AND PURPOSE: Civilian Gunshot Wounds (GSWs) to the head are important causes of mortality. The severity of GSWs is related to several factors. Patients with GSWs tend to do very well or very poor depending on these factors. METHODS: We retrospectively reviewed 47 patients with GSWs to the head during the last 5 years. Clinical and radiological findings of cases are described. Statistical analysis was used to find the effects of all independent variables with mortality and the prognostic factors. RESULTS: Glasgow Outcome Scale results showed that 38% of patients died, 13% were moderately disabled and 49% had good recovery at discharge. Patients with respiratory depression, hypovolemia, bilateral pupil dilatation, Glasgow Coma Scale (GCS) scores of 3 to 5, central bihemispheric and transventricular injury experienced 100% mortality. The mortality rate was 58% in patients with intracerebral or subdural hematoma, 78% in multilobar injury, 14% in unilobar injury and 57% in self-inflicted wounds. The postoperative mortality was 27%. CONCLUSION: The manuscript describes the clinical experience of penetrating missile injuries in a Turkish civilian practice. Mortality and/or poor outcome are relatively high in spite of the cases wounded by low-velocity weapons. We should emphasize that following stabilization of vital signs, all patients with GCS scores of 3 to 5 should be evaluated immediately with CT and treated conservatively. If it is appropriate the patients with a GCS score higher than 8 should undergo surgery. Patients with GCS scores of 6 to 8 should be followed closely and treated with surgery when necessary even if they have poor prognosis.

Rapid enlargement and recurrence of a preexisting intrasellar craniopharyngioma during the course of two pregnancies. Case report.

Enlargement of preexisting pituitary adenomas during pregnancy is well documented, but this phenomenon is unusual for nonendocrine pituitary tumors such as craniopharyngiomas. Only six cases of craniopharyngioma have been reported as presenting during pregnancy. The authors describe a 19-year-old woman who presented with amenorrhea and galactorrhea caused by an intrasellar mass. Seven months later, when she was 20 weeks pregnant, the patient developed sudden visual dysfunction. Emergency transsphenoidal surgery was performed to restore visual function, and the tumor was found to be a craniopharyngioma. The patient had spontaneous labor and delivered a healthy infant at term. The tumor recurred 4 years later, during her second pregnancy, and was again entirely removed via a second transsphenoidal approach. She again had a normal term delivery. During the 5-year follow-up period she has demonstrated no endocrinological or visual dysfunction. Control magnetic resonance images have revealed no recurrence of the tumor. The transsphenoidal approach seems to be the safest procedure to use during pregnancy to achieve an immediate optic nerve decompression and to preserve pituitary function.

Migration of the abdominal catheter of a ventriculoperitoneal shunt into the scrotum--case report.

A 3-day-old male neonate presented with migration of the ventriculoperitoneal (VP) shunt tip through the patent processus vaginalis resulting in scrotal hydrocele. The association of myelomeningocele with hydrocephalus may have been a predisposing factor in this rare complication. Development of scrotal swelling or hydrocele in a child with VP shunt should be recognized as a possible shunt complication.

Cerebral metastasis of a uterine leiomyosarcoma--case report.

A 38-year-old female presented with sudden neurological deterioration 6 years after an operation and chemotherapy for uterine leiomyosarcoma. An extremely rare metastasis of the uterine leiomyosarcoma to the brain was identified and totally resected. Whole brain irradiation (50 Gy) was given. A recurrence of the metastasis was resected 10 weeks later. She ultimately died of a second recurrence. Aggressive surgical management of cerebral metastasis of uterine leiomyosarcoma may achieve an improved outcome.

Variations of the extreme-lateral craniocervical approach: anatomical study and clinical analysis of 69 patients.

OBJECT: The aim of this study was to describe six variations of the extreme-lateral craniocervical approach, their application, and treatment results. METHODS: During a 4-year period 69 patients underwent surgery in which six variations of the extreme-lateral craniocervical approach were performed. The variations included: the transfacetal approach (TFA), performed to treat four lesions in the upper cervical spine anterior or anterolateral to the spinal cord; the retrocondylar approach, to treat five intradural lesions located anterolateral to the medulla oblongata and six vascular lesions to expose the extradural segment of the vertebral artery (VA); the partial transcondylar approach (PTCA), to treat 18 intradural lesions located anterior to the medulla oblongata; the complete transcondylar approach (CTCA), to treat 13 extradural lesions that involved the lower clivus and anterior upper cervical spine; the extreme-lateral transjugular approach, to treat 14 jugular foramen tumors; and the transtubercular approach with or without division of the sigmoid sinus, to treat complex VA and vertebrobasilar junction aneurysms. An anatomical prosection was performed to study the surgical exposure of each of the six variations of the extreme-lateral craniocervical approach. Total removal was achieved in 35 (69%) of the patients with tumor; subtotal resection was achieved in 16 (31%) of those patients. In the 12 patients with VA aneurysms, seven underwent clipping, three underwent trapping and a vein graft bypass procedure, and two underwent trapping without the use of a bypass procedure. In five other patients, different cystic, inflammatory, and other vascular lesions were successfully treated. Fifty percent of the patients who underwent surgery via the TFA, 83% via the of the CTCA, and 11% via the PTCA required an occipitocervical fusion procedure. The mean Karnofsky Performance Scale score was 74.7 preoperatively and 76.4 postoperatively. Major complications were hydrocephalus (nine patients), cerebrospinal fluid leakage (seven patients), worsened cranial nerve function (seven patients), vertebrobasilar vasospasm (one patient), and sigmoid sinus thrombosis (one patient). CONCLUSIONS: To treat lesions in the region of the foramen magnum and surrounding areas, the approach should be tailored to each specific lesion to provide the needed exposure without unnecessary operative steps.

Surgical management of cavernous malformations of the brain stem.

Different surgical approaches to the brain stem with results of excision of brain stem cavernous malformations are reported. Nine patients with brain stem cavernous malformations were operated with six different approaches. The patients were evaluated neurologically, and by magnetic resonance imaging (MRI) examination. All patients had at least one and often more episodes of haemorrhage. Seven patients underwent the total removal of the malformation, without recurrence. One patient with a large medullary cavernoma had recurrence, but without further growth. One patient with a large pontomesencephalic malformation and partial resection, suffered rebleeding due to residual cavernoma. The mean follow-up period was 49 months (range 3-112). The results of surgery were excellent or good in eight patients, and poor (worsening) in one. It is concluded that surgical resection is recommended for the cavernous malformations of the brain stem which are symptomatic, have bled or are growing, and are approachable through one of the pial surfaces of the brain stem. Different skull base approaches are useful for this procedure. Radiosurgery is not recommended in such cases.

The natural history of late diagnosed or untreated growing skull fractures: report on two cases.

Growing skull fractures (GSF) are rare complications of head trauma. Cases after childhood are extremely rare and demonstrate complicated pathological conditions which necessitate extensive treatment. We report on two rare cases of intracranial cysts related to growing skull fractures which are secondary to trauma sustained during childhood, and have been discovered in adolescence.

Multiple meningiomas and intracranial aneurysms: a case report and review of the literature.

An extremely rare case with multiple meningiomas and multiple aneurysms is reported. This 48 year-old female had her meningiomas at the convexity and along the sphenoid wing, and intracranial aneurysms at the basilar tip, left middle cerebral artery bifurcation, and left pericallosal artery. All of them were shown by preoperative radiological evaluation. During the operation, two more meningiomas, again at the sphenoid wing and at the tentorium, were found. There was no evidence of either a connective tissue disease or neurofibromatosis.