The distinction between femoral artery pseudoaneurysms and other causes of groin masses: value of duplex Doppler sonography

Department of Radiology, University of Michigan Hospitals, Ann Arbor 48109-0326.

With the increasing use of percutaneous transfemoral coronary angioplasty in conjunction with thrombolytic as well as anticoagulant therapy, the sonographic evaluation of groin masses, with particular emphasis on differentiating pseudoaneurysms from hematomas and other abnormalities, has become more common. Seventy-three sonograms of the groin in 60 patients (65 different groins) were reviewed retrospectively to determine the accuracy of duplex Doppler sonography in distinguishing femoral artery pseudoaneurysm (a surgical condition) from other causes of groin masses (e.g., hematomas) that are generally treated conservatively. Nineteen cases of pseudoaneurysm, 19 cases of hematoma, and 27 other conditions were studied. Of the 73 sonograms performed, 53 included duplex Doppler studies; one Doppler study was false-negative and two were possibly false-positive. The sensitivity, specificity, and accuracy of duplex Doppler sonography in the detection of femoral artery pseudoaneurysm was 95 +/- 5.8%, 94 +/- 6.4%, and 94 +/- 6.4%, respectively (95% confidence limit). We conclude that duplex Doppler sonography is of value in the differential diagnosis of groin masses.
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