Fig. 5
From: Atypical skeletal involvement in patients with Erdheim–Chester disease: CT imaging findings
CT images in a 52-year-old man with pelvis, spine, and ribs involved. A–B axial pelvic CT images and C coronal reconstruction pelvic CT image show mixed osteolytic and osteosclerotic lesions in the right iliac bone and the sacrum with the destruction of the sacroiliac joint, as well as multiple lytic lesions with sclerotic margins in the right iliac bone. D Axial chest CT image demonstrates focal osteosclerotic lesion of the ninth left side rib without expansion (arrow)