Cardiac borders, thoracic aorta, mediastinal borders, and lungs within normal limits. Right hemidiaphragm slightly elevated.
Air-fluid levels in multiple small bowel loops, more pronounced in right abdomen, one of which is dilated (right of midline at level of L1-L2).
Syndesmophytes at multiple levels. Sacroiliac joint narrowed bilaterally, perhaps even ankylosed. Skeletal findings consistent with ankylosing spondylitis.