Evaluate for cortical tubers, some ependymal giant cell astrocytoma. Compared to MRI for -- 13 -- 07. 2-year-old male with tuberous sclerosis. Pre-and post infusion CT of brain:Small area of calcific density at the level of left foramina of Monro several enhancement is noted. This lesion measures approximately 4.5-mm times 4 1/2 mm in transaxial dimension. This finding cannot be properly compared with prior MRI due to technique difference and pattern of enhancement as well as a slice thickness. The lesion however appears grossly stable.A heavily calcified lesion in the subependymal lining of the left lateral ventricle at the level of the trigone is consistent with a calcified tuber with no appreciable enhancement due to is heavy calcification. This lesion appeared as an area of low signal intensity on T2-weighted images of MRI of brain and measured approximately 8 mm times 6-mm in transaxial dimension. On the current CT examination this lesion measures 7.6 mm x 8 0.1-mm. multiple additional small punctate calcific lesions of the subependymal lining of the lateral ventricles are also present with no enhancing component. The A. minimally cortical based calcific tumor in the right frontal lobe is also present. This lesion demonstrates no definitive enhancement the overall appearance of this lesion is similar to what was noted on prior MRI examination. 20 cc of Omnipaque was utilized for the above study.
Although comparison to the prior MRI is not accurate due to difference in technique, the overall appearance of patient's calcific tubers in the left ventricle as well as the cortex of the right frontal lobe remain essentially stable.