PMC7298525_01
On CT scan, an occipital well-defined isodensity round mass had a thin enhanced peripheral rim, invaded skull bone, and superior sagittal sinus.
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The preoperative CT scan showed an occipital well-defined isodensity round mass, which had a thin peripheral rim enhancement, invaded skull bone and superior sagittal sinus (SSS) (Fig. 1).
On preoperative MRI, an extra-axial isointense mass on T1W enhanced peripherally and invaded superior sagittal sinus on gadolinium-enhanced T1W, was hyperintense on FLAIR and hypoperfused on DWI.
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T1W, which enhanced peripherally on gadolinium-enhanced T1W. This mass was hyperintense on FLAIR and restricted diffusion on diffusion-weighted imaging (DWI) (Fig. 2).
(A) the patient was in the prone position and U-shaped incision was used. (B) The pus (green arrow) was taken and sent for culture. (C) The skull bone was invaded (blue arrow). (D) Operative field after opening dura and tumor excision.
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After the elevation of the skin flap, we encountered the pus from the infected mass invading the skull bone and the subcutaneous layer (Fig. 3).
On macroscopic pathology, the tumor was a well-defined, lobulated, pearly mass.
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The tumor was a well-defined, lobulated, pearly mass (Fig. 4).
At a one-month postoperative follow-up, CT scan shows no remnant mass.
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At a one-month postoperative follow-up, the CT scan showed no remnant mass (Fig. 5).