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Figure 1: (a) Computed tomography scan performed immediately following the first surgery, showing a hyperdense lesion in the temporal base (arrow). (bd) T2-weighted magnetic resonance imaging (axial and coronal images) performed 2 years later (before the second surgery). A well-defined hypointense round lesion is seen (arrow) in the right temporal base, corresponding to where the retained gauze was found

Figure 1: (a) Computed tomography scan performed immediately following the first surgery, showing a hyperdense lesion in the temporal base (arrow). (bd) T2-weighted magnetic resonance imaging (axial and coronal images) performed 2 years later (before the second surgery). A well-defined hypointense round lesion is seen (arrow) in the right temporal base, corresponding to where the retained gauze was found