Cardiac hemangiomas of the left atrial appendage present with specific CT and MR imaging features but remain difficult to differentiate from other myocardial or pericardial tumors.
These CT/MR features may narrow differentials for left atrial appendage masses; leaves open reliable noninvasive diagnosis.
Cardiac hemangiomas are rare, benign primary cardiac neoplasms. We describe the CT and MR imaging findings of a cardiac hemangioma arising from the myocardium of the left atrial appendage and protruding into the pericardial cavity. The tumor displayed homogenous density on CT, heterogeneous signal intensity on MR, and inhomogeneous enhancement after intravenous contrast administration. The hemangioma in this case was difficult to differentiate from other myocardial or a pericardial tumor.
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Oshima et al. (2003) studied this question.
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