Echocardiography is the preferred initial imaging method for assessment of cardiac
masses. Cardiac magnetic resonance (CMR) imaging, with its excellent tissue characterization
and wide field of view, may provide additional unique information. We evaluated the
predictive value of echocardiography and CMR imaging parameters to identify tumors
and malignancy and to provide histopathologic diagnosis of cardiac masses. Fifty patients
who underwent CMR evaluation of a cardiac mass with subsequent histopathologic diagnosis
were identified. Echocardiography was available in 44 of 50 cases (88%). Echocardiographic
and CMR characteristics were evaluated for predictive value in distinguishing tumor
versus nontumor and malignant versus nonmalignant lesions using histopathology as
the gold standard. The Wilcoxon rank-sum test was used to compare the 2 imaging methods'
ability to provide the correct histopathologic diagnosis. Parameters associated with
tumor included location outside the right atrium, T2 hyperintensity, and contrast
enhancement. Parameters associated with malignancy included location outside the cardiac
chambers, nonmobility, pericardial effusion, myocardial invasion, and contrast enhancement.
CMR identified 6 masses missed on transthoracic echocardiography (4 of which were
outside the heart) and provided significantly more correct histopathologic diagnoses
compared to echocardiography (77% vs 43%, p <0.0001). In conclusion, CMR offers the
advantage of identifying paracardiac masses and providing crucial information on histopathology
of cardiac masses.
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Article info
Publication history
Published online: October 19, 2015
Accepted:
October 9,
2015
Received in revised form:
October 9,
2015
Received:
August 14,
2015
Footnotes
This project was supported by grant number K12HS019473 from the Agency for Healthcare Research and Quality (Rockville, Maryland).
See page 140 for disclosure information.
Identification
Copyright
Published by Elsevier Inc.