Secondary malignant neoplasm of brain [C79.31] / Secondary malignant neoplasm of other parts of nervous system [C79.49], Reason for Study: ^Reason: meningioma History: ha Post left suboccipital craniectomy with left cerebellar hemispheric lesion resection status.Multiple susceptibility artifacts on the left cerebellar hemisphere indicate post operative blood products.Comparing to preoperative scan, majority of enhancing mass lesions are not seen. However, there are somewhat irregular linear enhancement along the anterior and inferior aspects of the left cerebellar hemisphere. It is unclear if these enhancing lesions could represent residual lesion or postoperative changes. Therefore, follow up imaging is warranted.There is left cerebellar tissue defect with CSF collection which is continuous to extra axial fluid collection indicating possible pseudomeningocele. The size of extracranial fluid collection is measured about 59mm (RL) x 24.6mm (AP) x 61.6mm (CC). The MR signal intensity of the content of pseudomeningocele is following that of the CSF.Ventricular system is slightly dilated but stable since prior scan in terms of size.There are multiple intra axial enhancing lesions which suggest multifocal metastatic lesions are unchanged since prior scan.There is no evidence of new ischemic or hemorrhagic lesion.The paranasal sinuses and mastoid air cells are clear.
1. Near total resection status of the left cerebellar lesion with some irregular linear enhancement of anterioinferior aspect of the cerebellar hemisphere as described above.2. Interval development of pseudomeningocele through the left suboccipital craniectomy site.3. Unchanged multiple metastatic nodules.4. No evidence of new ischemic or hemorrhagic lesion.