MRI拡散強調像が感染性腎嚢胞の診断に有用であった1例

A case of infected renal cyst which was accurately diagnosed using MRI DWI：a case report

感染性腎嚢胞はドレナージ治療が基本であるが，腎嚢胞が多発している場合はCTや超音波検査のみではしばしば感染の責任病変の同定に難渋することがある。今回我々はMRIの拡散強調像にて感染した腎嚢胞を同定し，CTガイド下経皮的ドレナージを施行し寛解した症例を経験したので，若干の考察を加えて報告する。

We report a case of infected renal cyst with fever and sense of fatigue. CT showed right renal cysts surrounded by a hyperdense area of perirenal fat tissue. We suspected infected renal cysts and two of renal cysts showed high signal on MRI-DWI（Diffusion Weighted Imaging）. We punctured the cysts and drained the fluid. One of them which showed partically high signal on MRI-DWI was serous drainage and the other which was high signal overall was purulent drainage. Two years later, the renal cyst did not recur.