(a) Coronal CT at the level of pelvis
(b) Coronal CT at the level of lumbar spine
Figure 3: Coronal noncontrast CT three days prior to discharge/approximately 11 weeks after initial presentation shows (a) new foci of gas (arrow) within the sacrum and iliac bones, left greater than right. Findings in keeping with the preceding iliac bone marrow biopsy showing extensive bone necrosis. (b) Spine at this point still remains normal in CT appearance.