CASE SUMMARY An otherwise asymptomatic 9-year-old girl presented Neurogenic bladder Urinary incontinence Chronic constipation Physical exam: Distal atrophy of the lower limbs Short gluteal cleft Family history: Diabetic mother IMAGING FINDINGS MRI of the spine was performed with sagittal T1 and sagittal STIR. The images show partial sacrococcygeal agenesis with S2 being the last fully formed vertebra and with a hypoplastic S3. There is a complete absence of coccyx.

There is also an abrupt wedge-shaped terminus of the cord, which lies opposite T12 An abnormal course of the cauda equina with separation of the anterior and posterior nerve roots, forming the “double bundle shape.” The dural sac is abnormally highly placed, ending at L5. What is your differential diagnosis? Source: Applied Radiology *This case is from Docplexus Editorial Team for educative purpose only.