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A 57-year-old man was referred to our hospital because of an acute onset of right flank pain. An intravenous urogram showed normal excretion from the left kidney, a calculus in the right pelvis, and a phlebolith in the right pelvis at 3 minutes after injection of the contrast material (Panel A), then showed delayed excretion of the contrast material by the right kidney, a dilated right renal pelvis and ureter to the bladder, and a filling defect around the ureteric meatus at 12 minutes after injection (Panel B). The findings are related to edema due to the passage of a calculus. After treatment with a nonsteroidal antiinflammatory drug, the pain resolved and the patient excreted a calculus. He was then discharged from the hospital.
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