 Several sequences are motion degraded. Given this caveat:The right cerebellar tonsil lies 11 mm below the level of the foramen magnum, and the left 10 mm. Both demonstrate abnormal pointed morphology and efface the adjacent posterior CSF spaces. There is a small prominence within the cervical cord at the level of C4, only partially imaged.There is a 10 mm ovoid T2 hyperintense, T1 hypointense, nonenhancing lesion within the soft tissues overlying the right paramedian maxilla.The ventricles and sulci are normal in size. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. No diffusion-weighted abnormalities are identified. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. Mucosal thickening is present within the left sphenoid sinus. The remaining paranasal sinuses and mastoid air cells are clear. There is no abnormal enhancement within the brain. Coronal images of the temporal lobes demonstrate the temporal horns, hippocampal formations and parahippocampal gyri to be normal in size and symmetric bilaterally without signal abnormalities, masses, or abnormal enhancement identified within the medial temporal lobes on either side. There is no evidence of mesial temporal sclerosis and there are no foci of heterotopic gray matter.
1.Several sequences are motion degraded.2.MRI evidence of Chiari malformation. A small prominence within the cervical cord at the level of C4, only partially imaged, may represent a small syrinx.3.There is a 10 mm ovoid T2 hyperintense, T1 hypointense, nonenhancing lesion within the soft tissues overlying the right paramedian maxilla. This is felt to represent an incidental nasolabial cyst.