case_images: PMC6739879_01
case_images: a-c Preoperative computed tomography scans show bilateral chronic subdural hematoma (CSH) in the posterior fossa associated with moderate hydrocephalus. d The preexisting CSH in the supratentorial region demonstrated no change.
case_images: crn-0011-0087-g01.jpg
case_images: PMC6739879_01_crn-0011-0087-g01.jpg
case_images: F1
case_images: A CT scan taken on his admission demonstrated an appearance of bilateral CSH in the posterior fossa associated with hydrocephalus (Fig. 1).
case_images: a A preoperative axial magnetic resonance imaging (MRI) T1-weighted image shows bilateral chronic subdural hematoma (CSH) with niveau formation (black arrowheads). b A coronal MRI scan, flair image, demonstrates the continuity of the posterior fossa CSH through the supracerebellar area (white arrowhead).
case_images: crn-0011-0087-g02.jpg
case_images: PMC6739879_01_crn-0011-0087-g02.jpg
case_images: F2
case_images: Magnetic resonance imaging showed niveau formation in the CSH and the continuity of the right and left hematomas through the supracerebellar area (Fig. 2).
case_images: a A 3-dimensional bone window image of the computed tomography (CT) scan shows the location of the burr hole near the transverse-sigmoid junction. b A postoperative CT scan 3 months after surgery demonstrates disappearance of the chronic subdural hematoma in the posterior fossa.
case_images: crn-0011-0087-g03.jpg
case_images: PMC6739879_01_crn-0011-0087-g03.jpg
case_images: F3
case_images: As his consciousness deteriorated rapidly, urgent burr hole irrigation for the posterior fossa CSH was performed under local anesthesia in the supine position (Fig. 3a). Follow-up CT scans taken 3 months after surgery demonstrated no recurrence of the CSH in the posterior fossa (Fig. 3b).