PMC8292643_01
Ultrasound at 34+6 weeks of gestation. The three-vessel trachea section of the fetus showed an anechoic area of 1.3 x 1.4 x 1.3 cm (white arrows) on the right side of the thorax, with clear boundaries and without vascular supply; the trachea was compressed and flattened.
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F1
A 1.3 x 1.4 cm cyst was found on the right side of the fetal thorax (Figure 1).
Fetal MRI at 35+3 weeks of gestation. An ovular-like area with long T1 and long T2 signal (white arrows) was found in the upper right thoracic cavity, on the right side of the lower trachea, above the ridge of the trachea. The boundary was clear, and the size of the lesion was about 1.5 x 1.2 x 1.5 cm.
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F2
The MRI showed a 1.5 x 1.2 cm x 1.5 cm cystic lesion in the right thoracic cavity of the fetus, which was considered as a congenital BC (Figure 2).
PMC8292643_02
(A) Chest CT scan of the newborn 3 days after birth. An irregular low-density lesion with a diameter of about 16 mm was seen in the upper right mediastinum, with a slightly unclear boundary. The CT value was about 8 Hu. No abnormal thickening of the pleura was observed, and no signs of effusion were observed in the pleural cavity. (B) Postoperative pathological findings show a bronchogenic cyst.
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F3
A postnatal chest CT scan confirmed a cystic lesion of about 1.6 cm on the right upper mediastinum (Figure 3A). Subsequent pathological findings (Figure 3B) confirmed the diagnosis of BC.