Marijuana-related Reversible Cerebral Vasoconstriction Syndrome.

The legalization of recreational marijuana in some countries has been accompanied by an increased number of case reports of serious cardiovascular and cerebrovascular complications. However, there have been few studies describing the detailed clinical course of reversible cerebral vasospasm syndrome (RCVS) associated with marijuana use. We herein report a unique case of recurrent bi-fronto-parietal subcortical (watershed) infarction in the setting of chronic daily marijuana use for several years, with evidence of bilateral anterior cerebral artery vasoconstriction. The quick resolution of symptoms with treatment and the normalization of cerebral vasoconstriction on follow-up imaging lend high certainty to the diagnosis of RCVS.

Case of Cerebral Amyloid Angiopathy-Related Inflammation - Is the Absence of Cerebral Microbleeds A Good Prognostic Sign?

OBJECTIVE: The aim of this study is to describe a case of pathologically proven cerebral amyloid angiopathy-related inflammation (CAA-I) without cerebral microbleeds (CMBs) and its clinical course. BACKGROUND: CAA-I is an uncommon variant of cerebral amyloid angiopathy. Keys to diagnosis rely on the physician's awareness of this entity, CMBs on magnetic resonance imaging (MRI), an often favorable response to immunosuppression, and ultimately brain biopsy. CAA-I with no CMBs is rarely reported. RESULTS: A 76-year-old woman presented with 4 weeks of headaches and was found to have visual neglect on the left part of the visual field. MRI of the brain showed sulcal/gyriform hyperintensity with associated leptomeningeal enhancement in the right occipital lobe on fluid-attenuated inversion recovery (FLAIR) imaging. No CMBs or large parenchymal FLAIR lesions were seen on MRI. Biopsy was consistent with CAA-I. The patient's headaches resolved spontaneously and no immunosuppression was initiated. The patient remained asymptomatic for the 18 months of follow-up. CONCLUSIONS: To the best of our knowledge, there has been only one previous case of pathology-proven CAA-I without CMBs reported and this was associated with a good prognosis. Lack of CMBs and/or large parenchymal FLAIR lesions may be a prognostic factor in this disease.

Comparison of Stroke Codes in the Emergency Room and Inpatient Setting.

BACKGROUND: Outcomes of acute stroke management are time dependent. Intravenous tissue plasminogen activator (t-PA) is indicated within 3-4.5 hours of symptom onset and endovascular intervention within 6 hours. Time to treatment may depend on the patient's location. This study seeks to determine whether there is a difference in the timing of key aspects of stroke codes between the emergency room and the inpatient setting. METHODS: Stroke codes ending in t-PA administration or endovascular intervention between 2010 and 2013 were included. Emergency room stroke codes were compared with those in the inpatient setting. Data were obtained from the Yarmon Stroke Center log. The variables were time to neurological evaluation, time to computed tomography (CT) scan, time to t-PA administration, time from CT scan to t-PA, and time to endovascular intervention. The variables were compared using the t test. RESULTS: One hundred twenty-two stroke codes were included (106 from emergency room and 16 from inpatient setting). There was no difference in the time to neurological evaluation (P = .19). The time to CT scan and to t-PA administration was significantly increased in the inpatient group (P ≤ .001 and P = .01, respectively). There was no difference in the time from CT scan to t-PA (P = .09) and in the time to endovascular intervention (P = .21). CONCLUSIONS: Our results show that in the inpatient setting, there was a significant delay in the time to CT scan and to t-PA administration and that the source of the delay is the time to CT scan.

Supraclavicular extraskeletal myxoid chondrosarcoma presenting with a sensorimotor polyneuropathy associated with anti-Hu antibodies.

Extraskeletal myxoid chondrosarcomas usually arise deep in the proximal extremities and limb girdles. Patients with this type of sarcoma have high rates of local recurrence and metastases, but do not typically have paraneoplastic syndromes. We report an unusual case of a 49-year-old man with anti-Hu syndrome in the setting of an extraskeletal myxoid chondrosarcoma. This case shows the importance of searching for antineural antibodies in oncologic patients with new neurologic deficits, and of having a judicious workup for occult malignancies in patients with known antineural antibodies.

Online monitoring of cerebral hemodynamics during hemodialysis.

BACKGROUND: Several factors, including anemia, diabetes, and hypertension, potentially could disturb the cerebral autoregulation mechanism in hemodialysis (HD) patients. This study examined the effect of hemodynamic and rheological changes on mean cerebral blood flow (CBF) velocity (MV) during HD. METHODS: Continuous online monitoring of MV and pulsatility index in the middle cerebral artery were performed in 18 HD patients by transcranial Doppler ultrasound during the entire HD period (range, 3 to 4 hours). In addition, blood pressure, hematocrit (Hct), and relative decrease in blood volume were continuously monitored. Blood samples were obtained at the beginning and end of HD to measure hemorheological variables. RESULTS: After HD, Hct increased significantly from 33.6% +/- 5.9% to 41.4% +/- 5.7% (P < 0.001). Blood and plasma viscosity increased significantly from 3.33 +/- 0.77 to 4.36 +/- 1.3 mPa.s (P < 0.001) and from 1.35 +/- 0.29 to 1.54 +/- 0.38 mPa.s (P < 0.001), respectively. The change in MV (DeltaMV) was not significantly different from zero and correlated significantly with change in Hct. During HD, mean arterial pressure (MAP) in 15 patients changed within the normal range (group I), whereas 3 patients developed hypotension (group II) and their MAP decreased from 99 +/- 5 to 60 +/- 8 mm Hg (P < 0.05). In both groups, DeltaMV were not significant. CONCLUSION: Results of this study suggest that CBF does not appear to be diminished significantly during HD.