Chapter: Abdomen & Pelvis
Subchapter: Kidneys & Urinary tract (Read entire chapter)
Diagnosis: Nephrolithiasis - Nonobstructing renal stoneUltrasound image (top) demonstrates a shadowing (dotted arrows) echogenic focus within the left lower renal pole (white arrow), consistent with a renal calculus. Non contrast CT (stone protocol, lower image) demonstrates again the high attenuation calculus. There are no signs of obstruction in either CT or US.
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