Conebeam CT as an Additional Tool in Digital Subtraction Myelography for the Detection of Spinal Lateral Dural Tears.

Lateral dural tears as a cause spontaneous intracranial hypotension occur in ∼20% of patients. Common imaging modalities for their detection are lateral decubitus digital subtraction myelography or dynamic CT myelography. Reports on the use of conebeam CT are scarce. We show 3 patients in whom the targeted use of conebeam CT during digital subtraction myelography was helpful in confirming the site of the leak.

Risk factors for the development of secondary intracranial hypertension in acute cerebral venous thrombosis.

PURPOSE: Intracranial hypertension (IH) can complicate cerebral venous thrombosis (CVT), potentially causing permanent visual loss. Current knowledge on risk factors for the development of IH following CVT is scarce. We applied a compound classifier (CSF opening pressure > 25 cmH2O, papilledema, or optic disc protrusion on MRI) as a surrogate for IH and studied the predictive value of thrombus location, the number of thrombosed segments, and thrombus volume. METHODS: We prospectively included 26 patients with acute CVT and complete MRI data. IH was defined by CSF opening pressure > 25 cmH2O, papilledema, or optic disc protrusion on MRI. Using high-resolution contrast-enhanced venography, we determined the thrombus location, number of thrombosed segments, and thrombus volume. We analyzed their association with IH by logistic regression, their predictive power by the area under the receiver operating characteristic curve, and their association with CSF opening pressure by linear regression. RESULTS: IH occurred in 46% of CVT patients and was associated with higher thrombus volume (AUC 0.759, p = 0.025) and superior sagittal sinus thrombosis both alone (OR 2.086, p = 0.049) and combined with transverse sinus thrombosis (OR 2.014, p = 0.028). Effects in patients presenting CSF opening pressure > 25 cm H2O and the compound classifier were consistent. Thrombus volume > 4 ml was the single most important predictor of higher CSF opening pressure (ß = 0.566, p = 0.035), increasing IH risk. CONCLUSION: Larger thrombus volume, dominant transverse sinus occlusion, and extensive superior sagittal combined with transverse sinus thrombosis were associated with IH. Thrombus volumetry might identify patients at risk for IH and direct further clinical evaluation.

Idiopathic intracranial hypertension - a wider spectrum than headaches and blurred vision.

BACKGROUND: The purpose of this study was to analyse less known clinical scenarios associated with idiopathic intracranial hypertension. METHODS: The study involved analysis of magnetic resonance imaging signs of idiopathic intracranial hypertension in patients with spontaneous rhinoliquorrhoea (n = 7), in patients with temporal lobe epilepsy and surgically treated antero-inferior temporal lobe meningo-encephaloceles (n = 15), and in patients who developed clinical signs of idiopathic intracranial hypertension following the treatment of spontaneous intracranial hypotension (n = 7). RESULTS: Three of six patients with spontaneous rhinoliquorrhoea and six of 15 operated patients with temporal lobe epilepsy due to temporal lobe meningo-encephaloceles showed magnetic resonance imaging signs of idiopathic intracranial hypertension and had a body mass index >30 kg/m2. Rebound high pressure headaches and sings of idiopathic intracranial hypertension occurred in seven of 44 surgically treated spontaneous intracranial hypotension patients. CONCLUSIONS: Magnetic resonance imaging findings should guide the clinician to consider (idiopathic) intracranial hypertension when patients develop spontaneous rhinoliquorrhoea, temporal lobe epilepsy secondary to temporal lobe meningoencephaloceles or high pressure headaches in spontaneous intracranial hypotension. Whether idiopathic intracranial hypertension must be regarded as a differential diagnosis or as a cause, or whether there are common pathophysiological pathways that lead to signs of idiopathic intracranial hypertension in this wider spectrum of disease is the focus of further study.

[Epilepsy-associated tumors of the central nervous system: Epilepsy surgery and oncological aspects]. / Epilepsieassoziierte Tumoren des Zentralnervensystems : Epilepsiechirurgische und onkologische Aspekte.

BACKGROUND: Among the tumors associated with chronic epilepsy, dysembryoplastic neuroepithelial tumor and ganglioglioma are the most common besides angiocentric glioma, pleomorphic xanthoastrocytoma and pilocytic astrocytoma. These tumors are usually considered as being benign. OBJECTIVE: To determine the best conservative and surgical treatment of tumors associated with epilepsy. MATERIAL AND METHODS: This article presents case reports of malignant transformation of a dysembryoplastic neuroepithelial tumor and of a tumor initially diagnosed as a ganglioglioma based on magnetic resonance imaging (MRI) criteria. Description of references in the literature on epilepsy surgery and the neuro-oncology of epilepsy-associated tumors. RESULTS: In the case of the initially histopathologically diagnosed dysembryoplastic neuroepithelial tumor, a malignant transformation occurred 5 years after incomplete resection. The differentiation from a glioblastoma was possible through the analysis of the methylation profile. In another case a tumor assumed to be a ganglioglioma showed an increase in size after 6 years. Initial histopathological results revealed a glioblastoma. The analysis of the methylation profile suggested the diagnosis of an anaplastic pleomorphic xanthoastrocytoma and as a differential diagnosis an anaplastic ganglioglioma. Tumor progress correlated with the worsening of seizures. CONCLUSION: Recent studies have shown that in the treatment of predominantly benign epilepsy-associated tumors neuro-oncological aspects should also be taken into account in addition to the epileptological considerations. In the case of malignant transformation epigenetic screening (methylation profiles) can help to classify the tumor entity more precisely.