Learning From a Missed Diagnosis: Complete Agenesis of the Corpus Callosum With Benign Hydrocephalus

In agenesis of the corpus callosum, ventriculomegaly without evidence of cerebrospinal fluid obstruction often requires no surgical intervention. Regular follow‐up every 3–6 months, then annually, is essential to monitor for signs of raised intracranial pressure or neurological decline—prompting advanced imaging and consideration of surgical management if deterioration occurs.