 The ventricles and sulci are within normal limits. There is no midline shift or mass effect. There is no intracranial hemorrhage. There are no areas of abnormal attenuation. There is no extraaxial fluid collection. Axial images demonstrate fullness at the level the foramen magnum, with sagittal images confirming slight abnormal caudal extension of the cerebellar tonsils below the level of the foramen magnum are approximate 6 mm, although this is incompletely evaluated on this exam. In addition, the cerebellar tonsils have a slightly pointed appearance on the sagittal images. The subsequent MRI of the brain is motion limited, and therefore the exact extent of caudal tonsillar descent is difficult to determine. There is moderate mucosal thickening in the left sphenoid sinus with trace mucosal thickening at the right sphenoethmoidal recess. The remainder of the visualized portions of the paranasal sinuses and mastoids/middle ears are grossly clear.
1. No acute intracranial abnormality.2. Findings suggestive of tonsillar ectopia versus mild Chiari one malformation, to be further detailed on the subsequent MRI of the brain report.