This Comparison Chart displays two axial non-contrast CT scans of the brain, demonstrating the evolution of cerebral edema. Image A (left) was taken immediately after a mechanical thrombectomy, showing significant diffuse brain swelling. Key diagnostic findings include the effacement of the cerebral sulci and cortical crowding, indicating increased intracranial pressure and loss of normal cerebrospinal fluid (CSF) spaces on the brain surface. The lateral ventricles appear prominent. Image B (right) is a follow-up scan from 4 days later, showing the resolution of the swelling. In this follow-up, the cerebral sulci have reappeared and are clearly visible, indicating a reduction in parenchymal pressure. A small hypodense area in the right middle cerebral artery territory is visible, consistent with a localized infarct. This comparison serves as an educational tool for identifying radiological signs of acute brain swelling and monitoring its clinical resolution over time.

This diagnostic image is an axial non-contrast computed tomography (CT) scan of the brain demonstrating features of diffuse cerebral edema. The scan shows a global loss of the normal grey-white matter differentiation, which is a classic sign of severe brain swelling or global hypoxic-ischemic injury. The cerebral sulci and cisterns are effaced, indicating significant mass effect and increased intracranial pressure as the brain parenchyma expands against the rigid skull. A hyperdense midline structure corresponding to the interhemispheric fissure is visible, along with small hyperdense foci likely representing calcified pineal or choroid plexus structures. The surrounding skull appears intact with normal density. Extracranial soft tissue swelling is also noted. Clinically, these findings are highly significant in the context of severe sepsis or meningitis, where progressive swelling can lead to brain herniation or brain death if not managed aggressively. This image serves as a critical educational example of generalized intracranial hypertension and its radiographic manifestations in emergency medicine and neurology.

This diagnostic axial non-contrast CT scan of the brain demonstrates classic findings of diffuse cerebral edema. The image reveals a generalized loss of grey-white matter differentiation throughout the cerebral hemispheres, with the brain parenchyma appearing abnormally hypodense. Significant mass effect is evident through the near-complete effacement of the cortical sulci and cisterns, creating a 'smooth' appearance of the brain surface. The ventricular system, including the lateral and third ventricles, appears slit-like and severely compressed due to the increased intracranial pressure and global tissue swelling. These radiological features are characteristic of significant intracranial hypertension and global hypoxic-ischemic injury or inflammatory processes, such as the hypersensitivity syndrome described in the clinical context. The scan is a primary educational example of how acute cerebral swelling alters normal neuroanatomical landmarks on computed tomography.

This diagnostic image displays four axial slices of a non-contrast Computed Tomography (CT) scan of the head, focusing on the brain and skull base. The primary finding is diffuse cerebral swelling associated with intracranial hypertension, clinically contexted in this case by cerebral malaria. Key features include generalized effacement of the cerebral sulci and cisterns, indicating significant mass effect from brain edema. The lateral ventricles appear slit-like and compressed. There is a notable loss of normal gray-white matter differentiation throughout the cerebral parenchyma, with a global decrease in tissue density. The lower slices show the posterior fossa and skull base, revealing compression of the subarachnoid spaces and crowding at the foramen magnum. In the most inferior slices, anatomical structures of the facial skeleton, including the nasal cavity, paranasal sinuses, and soft tissues of the neck, are visible with some evidence of overlying soft tissue swelling. This series illustrates the neuroradiological manifestations of acute cerebral edema and the resulting compromise of intracranial CSF spaces.