Primary primitive neuroectodermal tumor in the pericardium—a focus on imaging findings: A case report

Figure 1 Chest radiography of pericardial primitive neuroectodermal tumor in a 3-year-old boy. Anteroposterior chest radiography revealed an enlarged, flask-shaped heart shadow, and a small amount of effusion in the right pleural cavity.

Figure 2 Computed tomography images of pericardial primitive neuroectodermal tumor in a 3-year-old boy. A: Plain computed tomography scan showed pericardial effusion and an indefinite soft tissue density mass in the left pericardial cavity; B and C: The mass was heterogeneously enhanced after intravenous administration of contrast medium (B and C). A coronary artery branch was detected passing through the mass (B).

Figure 3 Magnetic resonance imaging of pericardial primitive neuroectodermal tumor in a 3-year-old boy. A and B: The mass showed a heterogeneous signal, mainly slightly hyperintense on T1-weighted images (A) and isointense on T2-weighted images (B). The left coronary artery branch was shown to be embedded within the mass (B), suggesting a pericardial origin of the tumor; C: Contrast enhanced magnetic resonance imaging showed the mass was inhomogeneous with marked enhancement, with a clear and definite border between the mass and the left ventricle wall.