Female, 12 years old, with history of Chiari malformation, no surgery done, yearly follow-up examination. The cerebellar tonsils remain pointed and descend 10 to 11 mm below the level of the foramen magnum, similar to the prior exam. On cine flow imaging, biphasic CSF flow is seen along the ventral brainstem and spinal cord. Mild flow related signal is seen along the dorsal spinal cord at the level of the cerebellar tonsils. Again, findings are similar to prior.A small prominence of the CSF space posterior to the cerebellum is partially imaged on this examination appearing overall similar to the prior study. The visualized spinal cord demonstrates normal signal intensity and morphology throughout. No evidence of syrinx is seen.There is a mild reversal of the normal cervical lordosis. Alignment is otherwise unremarkable. Vertebral body heights are preserved and marrow signal characteristics are unremarkable. No evidence of spinal canal or foraminal narrowing is seen.
1.Findings compatible with Chiari malformation appearing similar to the prior examination.2.Partially visualized is a small prominence of the CSF space posterior to the cerebellum which may represent a small arachnoid cyst or focal prominence of the cistern.3.Appearance of the spinal cord remains within normal limits.