Case

A 6-month-old male infant presented with a primary complaint of seizures persisting for one week. A non-contrast CT scan of the head revealed several significant findings. There was a marked thinning of the corpus callosum accompanied by colpocephaly, characterized by disproportionate dilation of the occipital horns of the lateral ventricles.  Along the bilateral lateral ventricular walls, nodular tissue with attenuation patterns consistent with grey matter was observed, suggestive of subependymal grey matter heterotopia. Additionally, features suspicious for closed-lip bilateral parieto-occipital schizencephaly were identified. Further CT scan dilated cerebrospinal fluid spaces within the left posterior fossa and benign enlargement of the subarachnoid spaces. (Figure 1, 2, 3, 4, 5) However, the calvarium, cerebral hemispheres, basal ganglia, and brainstem were structurally normal, with no evidence of midline shift or mass effect. These imaging findings collectively suggest a diagnosis of subependymal grey matter heterotopia associated with corpus callosum dysgenesis, colpocephaly, and potential schizencephaly. The dilated posterior fossa and subarachnoid spaces appear to be incidental findings, likely of benign origin.