Posterior mediastinal extralobar pulmonary sequestration misdiagnosed as a neurogenic tumor: A case report

Figure 1 Chest computed tomography: Posterior mediastinal tumor measuring 1. 2 cm × 1.4 cm × 3.3 cm in size. The tumor consists of some cystic areas and shows slight enhancement in the arterial phase.

Figure 2 Chest magnetic resonance imaging. A: The tumor shows heterogeneous enhancement after an enhanced scan (red arrow); B: The supplying vessel (red arrow) can be seen between the hemiazygos vein and the descending aorta.

Figure 3 The tumor in the thoracoscopy. A: The pyramidal tumor with two blood vessels can be seen in the posterior mediastinum (black arrow 1: Tumor; 2: Draining vein; 3: Supplying artery); B: The tumor has its own pleural covering and is isolated from the lung.

Figure 4 Complete resection of the tumor: Yellowish liquid was visible after cutting it open.

Figure 5 Pathology examination: Ciliated columnar epithelium, cartilage, and squamous cells lining the wall of the dilated, duct-like, cystic structure. Obsolete hemorrhage and focal hyperplasia in the interstitial tissue are seen.