Figure 6. Magnetic resonance imaging of an acquired cystic disease-associated renal cell carcinoma in the 67-year-old man in Case Report 2. (A) An axial T1-weighted image shows a left pelvic tumor with heterogeneous low signal intensity (white arrow). (B ,C) Axial (B) and coronal (C) T2-weighted images show a left pelvic tumor with heterogeneous low to slightly high signal intensity, as indicated by the white arrow. (D) A diffusion-weighted image (DWI) demonstrates a left pelvic tumor with renal parenchyma-equivalent signal intensity (white arrow). The yellow arrow indicates acquired renal cysts, which have different signals on T1- and T2-weighted images and DWIs, depending on their contents, including hemorrhage and abundant protein.