A 42-year-old man with intermittent abdominal pain. A. Contrast-enhanced CT: diffuse irregular thickening of the right hemidiaphragm ( small arrows) and low density nodules in the spleen. Note also multiple phleboliths (long arrows) in the tumor. B. T2-weighted MRI: extremely high-signal intensity of the right diaphragm and the coeliac area. Splenic nodules have same signal intensity as the diaphragmatic lesion. C. Photomicrograph of surgical biopsy specimen (x25, H-E stain): numerous vascular spaces of irregular size separated by fibrous trabeculae.