PMC9329790_01
Imaging features. The recurrent lesion appeared as a mixed-signal intensity located in the right temporal-parietal lobe with a polycystic compartment, patchy hypointensity (orange arrow), liquid level inside (blue arrow), and line-like low signal areas at the periphery, surrounded by extensive oedema on axial T2-weighted images (left). Axial contrast-enhanced T1-weighted MR image (middle) demonstrated marked enhancement in the solid portions (orange arrow) of the recurrent mass and no enhancement of the cyst (blue arrow). Axial CT scan of the primary lesion showed a round-like area of mixed density (orange arrow), measuring about 6.3*6.3 cm, in the brain parenchyma of the right parietal lobe with compression and deformation of the right lateral ventricle (right).
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The surrounding brain is edema and compressed ( Figure 1 ; left). Brain-enhanced CT (T1W1) showed a solid cystic enhancement of the mass ( Figure 1 ; middle). CT of the primary lesion showed a round-like 6.3*6.3 cm mixed density shadow in the brain parenchyma of the right parietal lobe with a compressed and deformed ventricle ( Figure 1 ; right).