Lateral Sinus Thrombosis: The Importance of the Unaffected Sinus.

BACKGROUND AND PURPOSE: Intracranial hypertension develops in only some patients with lateral sinus thrombosis (LST), for reasons that are unclear. The purpose of this study was to evaluate a possible association between patency of the unaffected sinus and clinical presentation of unilateral LST. METHODS: A computerized search identified patients with LST, hospitalized in Soroka Medical Center. Patients with signs of increased intracranial pressure (iICP) and those with normal intracranial pressure (nICP) were compared. CT venography or MR venography confirmed the diagnosis, located the thrombosis, and determined the dominant lateral sinus (LS). Diameters of the right and left LSs (the occluded and unaffected) were compared to the diameter of the distal superior sagittal sinus (SSS). RESULTS: Of the 50 patients identified, 30 had iICP and 20 nICP. The dominant LS was the right one in 39 (78%) and the left one in 8 (16%); 3 (6%) had equal LS dominance. The dominant sinus was affected in 32 (70%) and the non-dominant in 15 (30%) patients. iICP was detected in 28/32 (81%) of patients with the dominant side affected, and 3/15 (20%) of those with non-dominant thrombotic sinus (P = .002). The unaffected sinus was narrower in iICP patients (size relative to SSS diameter = 43% in iICP vs. 86% in nICP [P = .0002]; size grading, according to Farb's method was 1.86 in the iICP vs. 3.57 in the nICP group [P = .0001]). CONCLUSIONS: Thrombosis was more common in the dominant LS. Unaffected LS patency appears to be associated with the development of increased ICP.

The diagnostic accuracy of the 'classic meningeal signs' in children with suspected bacterial meningitis.

To prospectively determine the diagnostic accuracy of nuchal rigidity, Kernig's sign, and Brudzinski's sign in children with suspected bacterial meningitis. Children 3 months to 17 years old diagnosed with bacterial meningitis and matched controls without bacterial meningitis were enrolled. The diagnostic accuracy was calculated independently for each test and for a combinations of tests. Of 86 children, 40 (46.5%) had bacterial meningitis. The sensitivity, specificity, LR+, and LR- were 64.5%, 53.5%, 1.4, and 0.7 for nuchal rigidity, 52.6%, 77.5%, 2.3, and 0.6 for Brudzinski's sign, and 51.4%, 95.0%, 10.3, and 0.5 for Kernig's sign. The three tests did not yield any better results in the subsets of children with moderate or severe meningeal inflammation, nor in relation to any of the causative pathogens. In children with suspected meningitis, the three classic signs did not have a high diagnostic value and better bedside diagnostic signs are required.

Fatal acute disseminated encephalomyelitis associated with cytomegalovirus infection.

We present the case of a young man with recent cytomegalovirus (CMV) infection who was admitted with generalised seizure and coma. Computed tomography scan and magnetic resonance imaging (MRI) on admission were normal. Despite transient initial improvement he rapidly deteriorated leading to repeated MRI that revealed findings highly suggestive of acute haemorrhagic leucoencephalitis (AHLE). The patient died despite treatment with pulse methylprednisolone and intravenous immunoglobulin. Acute disseminated encephalomyelitis (ADEM)/AHLE should be considered in the differential diagnosis of rapid neurological deterioration even when initial imaging is normal. This case report underscores the importance of early diagnosis as early aggressive treatment may improve outcome.