CincyKidsRad

Pulmonary sequestration

Coronal contrast enhanced CT images of the chest and a patient with pulmonary sequestration shows consolidation of a portion of the left lower lobe with a systemic artery arising from the abdominal aorta and venous drainage extending to the portal vein. Pulmonary sequestration is a developmental anomaly whereby a portion of lung tissue does not connect to the bronchial tree or pulmonary arteries. It most commonly occurs in the lower lobes and is more common on the left.

Similar cases

Coronal maximum intensity projection (image 1) and standard projection (image 2) from contrast-enhanced CT display a systemic artery (arrow) supplying atelectatic lung tissue (arrowhead) in the right lower lobe. The atelectatic lung is also seen on chest x-ray (image 3). The systemic arterial supply to the lung is consistent with pulmonary sequestration. Pulmonary sequestrations can be intralobar or extralobar, the latter possessing a separate visceral pleura and venous drainage. Extralobar sequestration can occasionally be located below the diaphragm.](https://app.figure1.com/case-detail/394e2b28-b2c2-4ac1-9f52-7bd3e9ed8124)

3D reconstructed image from a chest CT shows the right lower lobe bronchus arising from the left lower lobe. Lung tissue is connected and crosses midline. This anomaly is extremely uncommon. A horseshoe lung is said to occur when the pulmonary tissue is connected at midline. Usually in these cases bronchial anatomy is normal. #ThoraxThursday](https://app.figure1.com/case-detail/4e109d1b-9eb9-488f-8a5b-eb923c47f2aa)

Frontal (image 1) and lateral (image 2) chest radiograph in a child with an anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) shows massive cardiomegaly and a left lower lobe pulmonary opacity. How can massive cardiomegaly cause a pulmonary opacity? #FridayQuizDay #FridayQuiz](https://app.figure1.com/case-detail/5c792aee-1181-44ae-bb75-277a331ebebd)

CT of the chest shows the left pulmonary artery (arrow) arising from the pulmonary artery. The left pulmonary artery then traverses posterior to the trachea and anterior to the esophagus. These findings are consistent with a pulmonary sling. Pulmonary sling is the only vascular ring to course between the trachea and esophagus. #ThoraxThursday](https://app.figure1.com/case-detail/7e5413a2-8ea2-4726-a2fa-0a58d81d713e)