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1Department of Medicine, Rheumatic Center of Niigata Prefectural Senami Hospital, Onuki Medical Clinic, Japan.
Objective:
We performed abdominal ultrasonography (US) on patients with rheumatoid arthritis (RA) to investigate the frequency and characteristics of gallstones (GS).
Methods:
Patients with RA (n = 224; 42 male and 182 female) underwent abdominal US.
Results:
The incidence of GS (including post-chorecystectomy patients) was significantly higher in female patients with RA (15.4%) than in female controls (5.2%, p < 0.01). There was no significant difference in GS incidence between male patients with RA (9.5%) and male controls (3.8%). The percentage of cholesterol stones was 100% in patients with RA with GS but only 66.7% in controls with GS (p < 0.01). Compared to patients with RA without GS, patients with RA with GS were older and had lower C-reactive protein levels, a decreased creatinine clearance and urinary calcium excretion, and an increased incidence of hypercholesterolemia.
Conclusion:
We observed a high incidence of GS in female patients with RA. With our previous observation of a high incidence of renal stones in patients with RA, these results suggest the importance of US as a diagnostic tool in the management of RA.
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