A 28-year-old man presented with chest pain. Laboratory investigations revealed mild leukocytosis with eosinophilia. Multidetector computed tomography (MDCT) revealed a pericardial heterogeneous cystic mass containing peripherally located foci of calcifications (Figure 1, white arrow) and no contrast enhancement (Figure 1, asterisk). T2-weighted magnetic resonance imaging (MRI) revealed a pericardial mass, which was heterogeneous isohyperintense with a hypointense wall (Figure 2A, arrow). The mass was heterogeneously isointense on contrast-enhanced T1-weighted MRI. There was no restriction of diffusion on diffusion-weighted imaging (Figure 2B, asterisk). Therefore, the patient was diagnosed with a pericardial hydatid cyst.
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