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Samples of abdominal fat aspirates from 73 patients were sent to us for staining and interpretation. Ten samples were positive for amyloid. We calculated the sensitivity, specificity, and predictive value of the procedure based on the findings and the clinical information and other biopsy data about these patients. Using the results from more traditional biopsies as the "gold standard," sensitivity was 57%, specificity was 100%, and the predictive value was 100% for positive findings in the abdominal fat aspirate. Although the sample size in this study was relatively small, the procedure was found to be a minimally invasive test of high clinical utility.
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