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Letter to the Editor: Pneumocephalus: Is the needle size significant?
Discussion. Pneumocephalus is defined by two mechanisms: a ball-valve and an inverted bottle concept.1 The ball-valve type implies positive pressure events, such as coughing or valsalva maneuvers, that prevent air escape. Tension pneumocephalus is included in this mechanism, causing a parenchymal mass effect. The inverted bottle theory includes a negative intracranial pressure gradient following cerebrospinal fluid drainage, relieved by air influx. A small pneumocephalus is usually sealed by blood clots or granulation, allowing spontaneous reabsorption and resolution.[1] Otherwise, the lateral positioning of a patient duri...
Source: Innovations in Clinical Neuroscience - February 1, 2018 Category: Neuroscience Authors: ICN Online Editor Tags: Assessment Tools CNS Infections Current Issue Letters to the Editor Neurologic Systems and Symptoms Neurology Stroke Traumatic Brain Injury epidural needle size Pneumocephalus spinal tap Source Type: research

Cytomegalovirus encephalitis radiographically mimicking lateral medullary stroke
Cytomegalovirus encephalitis may demonstrate unique MRI characteristics that allow for earlier diagnosis and treatment.
Source: Neurology Clinical Practice - December 10, 2018 Category: Neurology Authors: Li, D., van Gaal, S. Tags: MRI, Encephalitis, Viral infections, HIV, All Cerebrovascular disease/Stroke Case Source Type: research

Rapidly Progressive atypical Posterior Reversible Encephalopathy Syndrome (PRES) associated with B-cell lymphoma (P4.065)
Conclusions:This case illustrates a rapidly progressive clinicoradiological syndrome with remarkable radiographical features of atypical PRS, and association with diffuse B-cell lymphomaDisclosure: Dr. Bronstein has nothing to disclose. Dr. Danesh has nothing to disclose. Dr. Petrovic has nothing to disclose. Dr. Ashikian has nothing to disclose. Dr. Arbuckle has nothing to disclose. Dr. Homafar has nothing to disclose.
Source: Neurology - April 17, 2017 Category: Neurology Authors: Bronstein, Y., Danesh, M., Petrovic, M., Ashikian, N., Arbuckle, R., Homafar, H. Tags: General Neurology: Vascular Neurology Source Type: research

What Causes Microcephaly?
Discussion Microcephaly is usually defined as an occipitofrontal head circumference (OFC) more than 2 standard deviations (SD) below the mean for sex, age and ethnicity. Severe microcephaly is used for OFC < 3 standard deviations. Rates of microcephaly range from 0.5-12 patients/10,000 live births. The OFC should be measured at every well child visit and at other opportunities and plotted on standard growth charts. The OFC is measured using a nonelastic tape measure around the largest part of the head with the tape measure held above the eyebrows and ears. It is a highly reproducible measurement. There are several diff...
Source: PediatricEducation.org - September 25, 2017 Category: Pediatrics Authors: pediatriceducationmin Tags: Uncategorized Source Type: news

A brief report on incidence, radiographic feature and prognostic significance of brain MRI changes after anti-PD-1/PD-L1 therapy in advanced non-small cell lung cancer
ConclusionsBrain MRI aberrations developed after ICI treatment are not uncommon, and their manifestations vary a lot. Patients developing brain MRI aberrations tended to have better prognosis, which needed to be further investigated.
Source: Cancer Immunology, Immunotherapy - October 6, 2021 Category: Cancer & Oncology Source Type: research