 Redemonstration of postoperative changes from a suboccipital craniotomy with resection of the posterior C1 arch. A postoperative extradural fluid collection is again seen within the overlying soft tissues now measuring 4.5 x 7.0 cm (craniocaudal) x 2.8 cm (transverse), which has increased slightly in size compared to the prior exam where it measured 3.3 cm AP x 6.8 x 2.7 cm. However there is still no significant mass effect upon the adjacent neo-dura. The cerebellar tonsils retain a pointed configuration and a thin process is again seen extending through the posterior CSF space as demonstrated previously, unchanged.There are no fractures or subluxations. The marrow signal is benign, including a stable benign hemangioma within the C6 vertebral body. C2/3: Unremarkable and unchanged.C3/4: Unremarkable and unchanged.C4/5: Mild posterior osteophyte disc complex causing minimal anterior cord flattening. There is no resulting stenosis. These findings are unchanged.C5/6: Mild posterior osteophyte disc complex causing minimal anterior cord flattening. There is no resulting stenosis. These findings are unchanged.C6/7: Unremarkable and unchanged.C7/T1: Unremarkable and unchanged.
1.Redemonstration of post-operative changes of a suboccipital craniotomy with resection of the posterior C1 arch. 2.The postoperative extradural fluid collection has increased slightly within the overlying soft tissues but does not exert mass effect upon the adjacent neo-dura. 3.The cerebellar tonsils retain a pointed configuration and a thin process is again seen extending through the posterior CSF space. These are unchanged.