Fig. 11.

Feeding vessel sign. A patient with a pulmonary arterial-venous malformation (white arrow)—located in the upper left lobe; the respective feeding vessel (white arrowhead) is clearly depicted. More in detail, the “feeding vessel sign” could be described in cases of a pulmonary vascular branch that runs towards a focal lesion—“getting lost” in its context: it resembles the channel of water which provides adequate filling (as reproduced in the embedded figure)