Fig. 1From: Isolated middle mediastinal mass associated with immunoglobulin G4-related diseasePreoperative imaging. a Chest X-ray showed an abnormal mass in the left mediastinum (yellow arrowheads). b Enhanced computed tomography of lung field (yellow arrowheads). c Enhanced computed tomography of mediastinal field; the left mediastinal mass was a homogenous round-shaped 3.8 × 2.4 cm in diameter (yellow arrowheads)Back to article page