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Is computed tomography a reliable indicator of stone solubility?
A Caroli1, G Del Favero, F Di Mario
1Istituto di Medicina Interna, Università degli Studi di Padova, Ospedale Civile di Montebelluna, Italy.
The Italian Journal of Gastroenterology
|April 1, 1990
Summary
Computed tomography (CT) stone densitometry can predict the success of oral litholysis therapy for radiolucent gallstones. Patients with higher stone density on CT scans are less likely to achieve successful dissolution with ursodeoxycholic acid (UDCA) treatment.
Area of Science:
- Gastroenterology
- Radiology
- Medical Imaging
Background:
- Gallstones are common, and oral litholysis is a treatment option for selected patients.
- Ursodeoxycholic acid (UDCA) is used for gallstone dissolution, but success rates vary.
- Identifying patients likely to respond to therapy is crucial for effective treatment.
Purpose of the Study:
- To determine if CT-measured gallstone densitometry can predict treatment success with oral litholysis.
- To assess the correlation between stone density and response to UDCA therapy.
Main Methods:
- Eight patients with radiolucent gallstones (<15 mm) unresponsive to 12 months of UDCA were evaluated.
- Computed tomography (CT) scans were performed to measure gallstone densitometry.
- Hounsfield units (HU) were used to quantify stone density, with >50 HU considered the upper limit for cholesterol stones.
Main Results:
- Seven patients still had stones after UDCA treatment.
- Six of these seven stones had densitometric values exceeding 50 HU.
- Higher stone density on CT correlated with a lack of response to UDCA therapy.
Conclusions:
- CT-evaluated gallstone densitometry can identify patients at high risk of oral dissolution therapy failure.
- Pre-treatment CT assessment may help select appropriate candidates for litholysis.
- This imaging technique aids in predicting treatment outcomes for gallstone dissolution.