Histologic Features

Autopsy findings: The heart and its vascular connections were normally formed. The right ventricular wall was thickened. The foramen ovale was probe patent as was the ductus arteriosus. The lungs had a normal size and configuration.

Structures of the bronchovascular bundle are marked: B = bronchiole, A = pulmonary artery, V = vein, L = lymphatic. Some small bronchial veins that are filled with blood lie to the left of the airway.

Note that the veins have thin walls. The artery is narrow and has a thick muscular wall. The endothelial lining of the lymphatics is not visible.

What is the anatomic anomaly in this picture? Answer

Clinical summary Image 2

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Answer: Presence of large veins in the bronchovascular bundle. Normally, large veins do not accompany the pulmonary artery; they are situated in the interlobular septa. In this case, large veins were present in most bronchovascular bundles of small bronchi and bronchioles. In some cases of this entity, the anomalous veins may not be present in every bundle.

Clinical summary Image 2

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