Benign neoplasm of cerebral meninges [D32.0], Reason for Study: ^Reason: grade I meningioma. History: meningioma. There is extensive right frontoparietal temporal occipital craniectomy extending toward left side across the midline and bilateral suboccipital craniectomy.There are significant encephalomalacia involving right temporal, right occipital, left parietal, left occipital and bilateral cerebellar hemispheres.In addition, extra axial T2 intermediate T1 iso signal intensity mass on the right petro-mastoid bone is seen which compresses right temporal lobe and right cerebellar hemisphere as well as right side lower pons.The mass is measured about 56.6mm (RL) x 41.9mm (AP) x 44.6mm (CC) at the level of pontomedullary junction and around the right side inferior cerebellar peduncle. Ventricular system appears to be within normal limits.There is no acute ischemic lesion.Susceptibility artifacts along with the tentorium may indicate surgical clips.Localized fluid collections on the right mastoid air cell is seen likely represent secondary to the mass.Comparing to prior scan performed at out side hospital on Oct 16 2015, there is no interval change since prior scan in terms of extra axial mass size, extent , associated mass effects and edema.The paranasal sinuses are clear.
1. Post craniectomy status of right frontal, parietal, temporal and occipital bone extended toward left side across the midline as described above.2. Extensive encephalomalacia on surgical site as described above.3. Residual extra axial mass [56.6mm (RL) x 41.9mm (AP) x 44.6mm (CC)] based on the right petro-mastoid region with mass effects toward right temporal lobe, right cerebellum and brain stem, unchanged since Oct 16 2015.