PMC7240894_01
MR showing multiple cysts in both kidneys, hyperintense on T2 (A and B) with ADC map (C) of DW images showing multiple areas of restricted diffusion in left kidney upper pole (arrow) suggestive of infected cysts. MIP of FDG PET/CT (D) shows focal increased tracer uptake in the same location (arrow). Axial and coronal images (E and F, arrows) showed a cystic lesion with intense peripheral uptake contiguous with the iso/hyperdense area at upper pole of left kidney. Delayed images (images G-I) showed similar finding but with improved image contrast (arrows)
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F1
Subsequently, MR was performed in which multiple cysts were noted in bilateral kidneys which were hyperintense on T2 weighted images [Figure 1A and B]. Apparent diffusion co-efficient (ADC) map [Figure 1C] of diffusion-weighted imaging (DWI) revealed multiple areas of restricted diffusion in left kidney upper pole (arrow) corresponding to cystic lesions reported on US abdomen, suggestive of infected cysts. Maximum intensity projection (MIP) image [Figure 1, image D] shows focal increased tracer uptake in the upper pole of left kidney (arrow). Corresponding axial and coronal images [Figure 1E and F, arrows] revealed a large cystic lesion with intense peripheral uptake in the upper one-third contiguous with the iso/hyperdense area at upper pole of left kidney. Delayed images [Figure 1, images G-I] revealed focal increased tracer uptake in infected cyst in upper one-third of left kidney (arrows), aiding accurate localization owing to decreased physiological activity in kidney.