Fig. 2

Non-contrast abdominal magnetic resonance image. a The solid part of both intra-abdominal (white arrow) and retroperitoneal (black arrow) masses showed inhomogeneously high intensity in T2-weighted imaging (T2WI). b Both masses also showed almost the same pattern as T2WI in fat saturation T2WI. c Both masses also showed inhomogeneously high intensity in diffusion-weighted imaging