[A spherical abnormality on a chest X-ray]. / Een bolronde afwijking op de longfoto.

A 80-year-old man had spherical abnormality on radiography of the chest. The differential diagnosis includes a tumor, hernia of Morgagni or a pericardial diverticulum. CT-scan demonstrated a pericardial cyst with a diameter of 13 cm. Pericardial cysts are rare and are commonly located at the right cardiophrenic angle.