Recent craniotomy for posterior fossa tumor resection and history of NF2. There are recent postoperative findings related to suboccipital craniotomy with a small amount of expected fluid in the surgical bed. There interval decrease in size of a cystic component in a heterogeneously enhancing tumor within the medulla. The cystic component now measures up to 8 mm, previously 12 mm, and the tumor overall measures up to 31 mm, previously 33 mm. There is decreased effacement of the foramen of Magendie. Other stigmata of neurofibromatosis type 2 are otherwise unchanged, including small bilateral vestibular schwannomas, small intracranial meningiomas, and a left optic nerve sheath meningioma. There is no evidence of acute infarct. There is no abnormal intracranial enhancement. There is no ventriculomegaly. There is no midline shift or herniation. The major cerebral flow voids are intact. There are scattered foci of enhancement in the scalp, which correspond to the sites of the previously inserted stereotactic frame screws. There is mucosal thickening and fluid within the left maxillary sinus, as well as scattered mucosal thickening elsewhere within the paranasal sinuses. There is also a small amount of bilateral tympanomastoid fluid, which is nonspecific.
1. Recent postoperative findings related to suboccipital craniotomy for subtotal resection of an ependymoma within the medulla with decreased effacement of the foramen of Magendie.2. Other stigmata of neurofibromatosis type 2 are otherwise unchanged, including small bilateral vestibular schwannomas, small intracranial meningiomas, and a left optic nerve sheath meningioma. 3. Findings suggestive of acute sinusitis.