Female, 2 months old, with abnormal movements, history of subarachnoid hemorrhage. Evaluate for structural laterality. Bilateral convexity subdural collections are seen, best visualized on series 1001. The left-sided collection is slightly larger than the right and measures up to 6 mm in thickness. There is susceptibility effect associated with the left-sided collection. The fluid is FLAIR hyperintense to CSF but relatively similar to CSF on T1 and T2-weighted images. The collections exert minimal regional mass effect on the underlying brain.A small extra-axial focus of diffusion restriction is seen along the right parietal lobe with associated susceptibility effect. Elsewhere no diffusion restriction is seen. Small foci of susceptibility effect are also present along the right sylvian fissure and right inferior frontal sulcus, as well as within the occipital horns of the lateral ventricles. No evidence of parenchymal edema is detected. Brain parenchymal morphology is within normal limits. No developmental anomalies or structural defects are identified. The pattern of white matter myelination is appropriate for age. The pituitary region is within normal limits. The corpus callosum is fully formed and intact. The brainstem and cerebellum are within normal limits. Ventricular size and morphology are normal.
Bilateral convexity subdural collections are seen measuring up to 6 mm in thickness on the left. The signal characteristics of the collections would favor that these represent chronic subdural hematomas. A small focus of extra-axial diffusion restriction and susceptibility along the right parietal lobe could indicate blood at an earlier stage of evolution. Findings are also seen suggesting a small amount of hemosiderin staining in the subarachnoid spaces and the ventricles likely indicating prior subarachnoid hemorrhage. The brain itself is developmentally normal.