Figure 1. Thoracic CT scan: Image B shows a well-defined hydatid cyst located in the inferior retrocardiac mediastinum (blue arrow), measuring 9.3 × 7.0 cm. The lesion displaces and compresses adjacent mediastinal structures, including the atria (Image C, yellow arrow), thoracic aorta (Image D, green arrow), and esophagus (Image A, white arrow).
