PMC4327556_01
MRI of the brain revealing a single, large, right, frontoparietal, ring-enhancing lesion with high signal intensity on T2-weighted images, low signal intensity on T1-weighted images and restricted diffusion on diffusion-weighted images.
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F1
A repeated brain MRI scan showed a worsening of the lesion, and the hypothesis of brain abscess was strongly considered (fig. 1).
MRI of the brain showing worsening of the right frontoparietal lesion after 4 weeks of treatment with ceftriaxone combined with metronidazole. On T2-weighted images, the central abscess is hyperintense, with a hypointense surrounding capsule and extensive surrounding edema.
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F2
Another brain MRI was performed, with evidence of further worsening of the lesion (fig. 2).
MRI of the brain evidencing almost complete resolution of the cerebral abscess after 12 weeks of treatment with trimethoprim-sulfamethoxazole.
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F3
There was also a favorable imaging response, with brain MRI undertaken a month after starting this therapy revealing almost complete resolution of the brain abscess (fig. 3).