PMC8571293_01
Head CT scan, preoperative CT scan of the head showed a mixed density lenticular mass with some air collection in the left frontal region (a), associated with effacement of the left ambient cistern (b). The bone window revealed thickening of the left frontal bone (c, arrow).
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F1
A noncontrast computed tomography (CT) scan of the head showed a mixed density lenticular mass with some air collection in the left frontal region [Figure 1a], which is associated with compression of the left lateral ventricle, and a 10 mm midline shift to the right and effacement of the left ambient cistern were observed [Figure 1b]. The bone window revealed thickening of the left frontal bone [Figure 1c].
(a and b) The axial sinus CT image, the axial sinus CT image demonstrated opacification of the left frontal, ethmoid, and maxillary sinuses (*), the corresponding image in the bone window revealed diffuse thickening and sclerosis of the right maxillary sinus wall (arrow).
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F2
The axial sinus CT image demonstrated opacification of the left frontal, ethmoid, and maxillary sinuses [Figure 2a], and the corresponding image in the bone window revealed diffuse thickening and sclerosis of the right maxillary sinus wall [Figure 2b], suggesting paranasal sinusitis and osteomyelitis of the maxillary wall.
Head CT scan, postoperative CT scan revealed that the left frontal epidural abscess has been removed with return of the midline (a), enlargement of the ambient cistern (b), opacification of the maxillary sinus (c), and the frontal bony defect (d).
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F3
On the 1st day after the operation, a CT scan revealed that the left frontal EDA was removed, with return of the midline and enlargement of the ambient cistern [Figure 3].
Head CT, a subsequent CT scan 3 months after surgery showed no signs of infection (a-c). Cranioplasty with titanium mesh was performed 9 months after surgery (d).
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F4
CT scan 3 months after surgery showed no signs of infection [Figure 4a-c]. Cranioplasty with titanium mesh was performed nine months after surgery [Figure 4d], and the patient recovered uneventfully.