Causes of a hyperemic peritesticular rim on dynamic and static scintigrams are reviewed. Of 6 patients exhibiting such a pattern, 3 had missed testicular torsion; the other 3 had tumor, trauma, or inflammation. The authors conclude that a hyperemic peritesticular rim is a nonspecific finding reflecting underlying pathophysiological changes and is not pathognomonic of missed torsion.
Two cases are reported in which bone imaging with 99mTc-labeled phosphate compounds revealed localized areas of decreased uptake corresponding to osteolytic metastases on bone radiographs. These "cold" bone lesions, although infrequent, should be considered to avoid false negative interpretations.
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