Diffusion‐weighted magnetic resonance imaging detection of renal cancer presenting with diffuse peritoneal metastases in a patient with hemodialysis‐associated acquired cystic disease of the kidney

A 59‐year‐old man was admitted with a large amount of ascites, cake‐like omental thickening, and dialysis‐associated acquired cystic disease of the kidney (ACDK). It was difficult to detect renal cancer, which was revealed as a primary site of peritoneal metastases by autopsy, with conventional cross‐sectional imaging, such as enhanced computed tomography and T2, T1, and dynamic gadolinium‐enhanced T1‐weighted magnetic resonance imaging, because multiple renal cysts caused marked distortion of the renal parenchyma and the cancer had necrosis. We demonstrated the usefulness of diffusion‐weighted imaging with a high b‐factor to detect renal cancer presenting with peritoneal metastasis in a patient with ACDK. J. Magn. Reson. Imaging 2009;29:953–956. © 2009 Wiley‐Liss, Inc.