T1 (Panel A) and T2 (Panel B)-weighted MRI images show enlargement of the subarachnoid spaces, establishing the diagnosis of benign extra-axial fluid of infancy. Follow-up T1 (Panel C) and T2 (Panel D)-weighted images reveal chronic subdural hematoma within the enlarged spaces. The child was completely asymptomatic from this and required no treatment. The areas of hematoma resolved spontaneously.
