TY - CHAP M1 - Book, Section TI - Subdural Hematoma Aspiration in the Infant A1 - Christian-Kopp, Sarah J. A2 - Reichman, Eric F. PY - 2018 T2 - Reichman's Emergency Medicine Procedures, 3e AB - Extra-axial fluid collections are described as fluid collection that are external to the brain parenchyma. These include epidural hematomas, subdural hematomas, and subarachnoid hemorrhages. Intra-axial fluid collections develop within the brain parenchyma. Extra-axial fluid collections in children are classified as symptomatic and asymptomatic. Symptomatic extra-axial fluid collections have been classified as effusions, hematomas, or hygromas. Their appearance on computed tomography (CT) scans and the treatment for each are identical (Figure 149-1).1 CT scan images of symptomatic extra-axial fluid collections usually demonstrate ventricular compression and flattening or obliteration of the cerebral sulci on CT scans (Figure 149-1). Asymptomatic or benign subdural fluid collections usually appear as a hypodensity over the frontal lobes with dilation of the cortical sulci, interhemispheric fissure, and Sylvian fissure. The ventricles are usually normal in size or slightly enlarged with no evidence of transependymal flow. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/07 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1159804886 ER -