Congenital cerebral cysts [Q04.6], Reason for Study: ^Reason: hx of colloid cyst w/ resection. Eval for change History: none Redemonstration of a 7 mm x 5.5 mm residual colloid cyst located at the junction of the third ventricle and bilateral foramen of Monro, unchanged in its MR characteristics and size since prior scan.Focal defect of anterior body corpus callosum indicating prior surgery related changes are again seen, unchanged since prior scan.There is no evidence of abnormal enhancement on the scan.There is no evidence of acute ischemic or hemorrhagic lesion on the 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, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Third ventricle residual colloid cyst, unchanged in its size and MR signal characteristics since prior scan.