Fig. 1

a–g Brain magnetic resonance imaging showed a 33 × 41 × 40 mm ring-enhanced capsule in the right frontal lobe with severe perilesional edema which leads to midline shifting to the left side, and the right ventricle was metamorphose. Diffusion weighted MR of the enhanced area revealed the lesion is an abscess. h Postoperative CT scan showed regular changes of post right temporoparietal craniotomy and deficiency of the right temporoparietal bone. i Pathological manifestation of the mass (HE× 100)