Improved detection of upper abdominal abscesses by combination of 99mTc sulfur colloid and 111In leukocyte scanning

Indium-111-labeled leukocyte scanning is an excellent technique for detecting abdominal abscesses. However, since labeled leukocytes are normally taken up by the liver and spleen, diagnosing upper abdominal abscesses can be difficult. A prospective study was undertaken to see if having a technetium-99m sulfur colloid liver-spleen scan to compare with the 111In leukocyte scan would improve the reader's ability to diagnose or exclude upper abdominal abscesses. Ninety patients with suspected upper abdominal abscesses were examined with 111In leukocyte scans followed immediately by conventional 99mTc sulfur colloid liver-spleen scans in the same projections. In 57% of patients with upper abdominal abscesses and 26% of all patients studied, the 99mTc sulfur colloid scan was essential to diagnose or exclude an upper abdominal abscess. The liver-spleen scan was considered helpful in another 13%. The addition of a 99mTc sulfur colloid liver-spleen scan to the 111In leukocyte study is useful when evaluating patients with suspected upper abdominal abscesses.
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