Clinical question: Known brain tumor with postop epidural fluid collection. Evaluate fluid collection. Signs and symptoms: None Non-enhanced CT of brain:Postoperative changes of right temporal -- frontal craniotomy for large partial resection of right frontal and anterior temporal lobe and. CSF density intradural collection at the surgical site.Epidural collection under the craniotomy flap measures 18-mm in thickness and extend along the entire length of the craniotomy flap (approximately 89 mm). The epidural collection has a thick high density rim along its medial aspect which is believed to represent thickened scarred and possibly calcified dura. When compared with prior MRI examination there is interval decrease in the thickness of epidural collection from 22.9-mm on prior exam to 18-mm on current exam. There is a subtle mass effect on the right frontal horn likely due to large extra-axial intradural CSF collection at the site of partial lobectomy. No midline shift is detected. There is no evidence of any edema of the adjacent brain parenchymal to this CSF collection.
1.Interval decrease in the size of epidural collection under the craniotomy flap in the right frontal region from prior MRI measurements of 22.9-mm to 18-mm on current exam.2.Postoperative changes of a large right anterior frontal and temporal lobectomy related CSF collection at the surgical site.3.No evidence of any new edema of the adjacent brain parenchymal to the lobectomy site.4.No evidence of hydrocephalus or midline shift.