Benign intracranial hypertension [G93.2] / Compression of brain [G93.5] / Headache [R51], Reason for Study: ^Reason: chiari malformation , pseudotumor cerebri, new and worsening headaches, please do with csf flow study History: new and worsening headache Brain MRIRedemonstration of suboccipital craniectomy and stable downward displacement of the cerebellum and the cerebellar tonsils, unchanged.There is also a tubular structure seen through the foramen Luschka to the level of distal aspect of the aqueduct, unchanged since prior scan.There is no evidence of acute ischemic or hemorrhagic lesion on scan.The ventricles, sulci and cisterns are symmetric and unremarkable. The gray-white matter differentiation is normal. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, or restricted diffusion/acute ischemia. The midline structures are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.CSF Flow studyThere are to and fro flow anterior to the craniocervical junction.Flow signal at the posterior aspect of the foramen magnum appears to be attenuated, unchanged since prior scan.The degree of flow signal was not calculated but the signal intensity appears to be similar to that of prior scan.Cervical spine MRIThere is normal cervical lordosis. The cranial-cervical junction demonstrates post decompression status, unchanged. Spinal cord signal intensity is normal.In particular, no evidence of syrinx.The vertebral body height is preserved. The bone marrow and end plates demonstrate a normal MR appearance. The cord signal is normal.
1. Post decompression suboccipital craniectomy of Chiari malformation status, no postoperative unusual finding.2. No evidence of syrinx. Ventricle size is stable and unremarkable.3. No evidence of acute ischemic or hemorrhagic lesion.