17 years, Male, Chiari malformation, do with CSF flow study. Brain: Minimal tonsillar ectopia is again seen with the right cerebellar tonsil relatively lower than the left, but without significant crowding at the foramen magnum. CSF flow sequence demonstrates preserved biphasic flow ventrally and dorsally at the foramen magnum. Remainder of the brain is unremarkable. No intracranial mass or mass effect. No parenchymal signal abnormality. No evidence of infarct or hemorrhage. Ventricles are normal in size. Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are clear. Bone marrow signal and extracranial soft tissues are within normal limits.Cervical Spine: The cervical spine is in normal alignment, aside from straightening which may be related to position. The vertebral body and disk heights are well-maintained. No worrisome focal marrow signal abnormality is appreciated. The spinal cord is of normal caliber and signal. No evidence of syrinx.There is no significant disk bulge, herniation, spinal canal or foraminal stenosis within the cervical spine.
1. Unchanged minimal cerebellar tonsillar ectopia without significant crowding at the foramen magnum and preservation of normal CSF biphasic flow. There is no clear imaging evidence of Chiari I malformation. Brain parenchyma is otherwise unremarkable.2. MRI cervical spine is unremarkable. Specifically, no evidence of syrinx.