13-month-old male patient with developmental delay. Evaluate for septo-optic dysplasia. Brain: There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are stigmata of complete absence of the corpus callosum. There are abnormal left parasagittal white matter tracts which indent the medial margins of the lateral ventricles, right greater than left, suggestive of Probst bundles. The anterior commissure is present, but appears hypertrophied and possibly slightly dysplastic.The septum pellucidum is absent. The optic apparatus and pituitary are grossly normal. The interhemispheric fissure extends to the third ventricle. The frontal horns of the lateral ventricles are small in size with enlargement of the posterior horns, consistent with colpocephaly.Cortical formation and sulcation otherwise appears grossly normal. Myelination appears appropriate for the provided patient's age. The basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. There is flattening of the left frontal convexity and right posterior parietal convexity, consistent with plagiocephaly. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable.Spine: Vertebral body heights are within normal limits. Alignment is within normal limits. Bone marrow signal is benign. Compared to the rest of the spinal canal, there is slight narrowing at the level of C1/C2 which could be due to hypertrophy of the posterior arch of C2. The conus medullaris is low normal in position terminating at the level of L2/L3. Cord signal is within normal limits. No fatty filum is identified. There is a small area of midline linear low T1 and T2 signal in the subcutaneous fat, extending from the level of mid S3 caudally to the extent of the imaged field at the level of the coccyx. This extends deep to the level of the bone.The bladder is markedly distended.
1. Findings compatible with complete agenesis of the corpus callosum. 2. Intact, but hypertrophied/dysplastic anterior commissure. 3. Grossly normal optic apparatus and orbits.4. Grossly unremarkable examination of the spine with linear area of low signal within the posterior subcutaneous tissues at the level of the lower sacrum to coccyx; while this may represent a partially imaged deep gluteal cleft, correlate with direct inspection. Prone imaging was not performed to assess for tethered cord.5. Markedly distended bladder.