Renal Calculi on CT

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Coronal noncontrast CT image from a patient who presented with left-sided renal colic. An obstructing calculus, present in the distal left ureter at the level of S1, measures 10 mm in maximal dimension. There is severe left hydroureteronephrosis and associated left perinephric fat stranding. In addition, there is a nonobstructing 6-mm left renal calculus in the interpolar region. (Image courtesy of Dr. Stuart Silverman, Brigham and Women’s Hospital.)

Read more about renal calculi in context:

Harrison’s Principles of Internal Medicine, 20e: Chapter 312. Nephrolithiasis

Read more about renal calculi:

The Color Atlas and Synopsis of Family Medicine, 3e: Chapter 70. Kidney Stones

Current Medical Diagnosis and Treatment 2020: Chapter 23-05. Urinary Stone Disease



Melanie Allison, DNP, MSN, RN, ACNP-BC

Executive Manager, Education & Learning, McGraw-Hill

Melanie Allison is the Executive Manager of Education & Learning with McGraw Hill. She earned her Doctor of Nursing Practice (DNP) degree and Post-Master’s Certificate in Nursing Education from The Johns Hopkins University. She earned her Master of Science in Nursing (MSN) degree, specializing as an acute care nurse practitioner (ACNP), from Vanderbilt University. Melanie has more than 20 years of experience as a registered nurse and nurse practitioner in adult cardiology and advanced lipid management. She is a part-time faculty member at a top school of nursing where she has taught for more than 16 years.