Calcified Costal Cartilage as a Cause of False Interpretation on Myocardial Imaging

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Abstract
Two cases of false interpretation of abnormal myocardial scan with 99mTc-pyrophosphate by calcified costal cartilage in the precorial region are presented. This communication reports the difficulty in correctly interpreting positive 99mTc-pyrophosphate myocardial scan in a case with calcified costal cartilages in the presence of abnormal electrocardiographic and enzymatic changes. Recent reports of false positive myocardial scans are briefly reviewed.