The bones should be checked on all abdominal X-rays.
This patient with hypercalcaemia - which was the cause of abdominal pain - has multiple sclerotic bone lesions (highlighted in red on the roll-over image).
The sclerotic lesions are due to metastatic prostate cancer in this patient.
Small bowel obstruction is again obvious on this image.
There is also a large lucent area above the left acetabulum with a pathological fracture. This lytic bone lesion was due to direct invasion of a pelvic tumour, also the cause of small bowel obstruction.