Kidney Stones Research Today is a free monthly online journal that collates and summarizes the latest research about Kidney Stones, including details on causes, symptoms, treatment, diagnosis of nephrolithiasis, calculi.

Nonobstructing renal stones on unenhanced CT: a real cause for renal colic?

Furlan A, Federle MP, Yealy DM, Averch TD, Pealer K

Department of Radiology, University of Pittsburgh Medical Center (Presbyterian Campus), 200 Lothrop St., Rm. 3950 CHP MT, Pittsburgh, PA 15213, USA.

OBJECTIVE: The purpose of this study was to evaluate the incidence of nonobstructing renal stones on unenhanced CT in patients presenting to the emergency department with renal colic and to determine whether this finding might be the cause of patients' symptoms. CONCLUSION: Nonobstructing renal stones on unenhanced CT are a frequent finding in patients evaluated in the emergency department for suspected renal colic. These stones are usually not recognized as the cause of pain by physicians and may be responsible for multiple clinical and radiologic evaluations. In the absence of other clinical or CT evidence of a separate cause, these stones are likely to be the cause of a patient's acute pain.

Published 23 January 2008 in AJR Am J Roentgenol, 190(2): W125-7.
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