Answer: Given the above findings, nephrolithiasis is the most likely diagnosis. Pyonephritis is a reasonable concern given the elevated white blood cell count, and needs to be excluded.
Question: According to the ACR appropriateness criteria, what is the best initial diagnostic test if you suspect nephrolithiasis?
- Abdominal radiograph (KUB)
- Renal ultrasound
- CT Abdomen and pelvis with contrast
- CT abdomen and pelvis without contrast
- CT Abdomen with contrast
- CT Abdomen without contrast
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