Bronchogenic cysts with infection in the chest wall skin of a 64-year-old asymptomatic patient: A case report

Figure 1 Imaging of the puncture test prior to surgery. A: On September 24, 2020, cytological puncture resulted in about 2 mL of pus, and a large number of acute inflammatory cells were found (× 200); B: On July 20, 2021, cytological puncture resulted in about 2 mL of pus, and an increased number of acute inflammatory cells were found (× 200); C and D: Represent other microscope fields of view of A and B, respectively.

Figure 2 Imaging prior to surgery. A: A low-to-no-echo area of about 8 mm × 19 mm × 26 mm in the patient’s subcutaneous soft tissue. The boundaries of the area were clear, and the morphology was clear. Furthermore, this area showed no obvious blood flow signal (September 24, 2020); B: A low-echo nodule of about 9 mm × 21 mm × 26 mm in the patient’s subcutaneous soft tissue. The boundaries of the nodule were clear, and the morphology was clear. At the same time, no intact envelope was found. A dense dot weak echo was found inside. The internal blood flow signal was not intense (July 20, 2021); C: Most of the cyst borders did not resemble the smooth walls of typical cysts, and the cyst appeared as a frizzy capsule instead. Echoes of the smooth wall can be seen in a few areas (white arrow; July 20, 2021); D: The inside of the cyst showed a relatively homogeneous low echo, and a small amount of oxalate calcification (white arrow) was found in some areas. The inflammation was mainly manifested in the cyst wall (July 20, 2021).

Figure 3 Postoperative histopathology. A: Combined with immunohistochemical staining for CK7 (+), CK20 (-), TTF1 (-) and S-100 (-), the histopathological examinations showed that the specimen was consistent with a bronchogenic cyst with obvious hyperplasia of histiocytes (× 100); B: The white arrows represent column-like cilia epithelial cells; C: Smooth muscle bundles; D: Bronchial glands.

Figure 4 Imaging of the postoperative area. A: Imaging of the postoperative area after 3 d of debridement and suture surgery; B: Imaging of the postoperative area after 20 d of debridement and suture surgery.