Example: There is a solid filling defect in the right mainstem bronchus. It is occluding the right mainstem bronchus and extends into peripheral branches of the right upper lobe bronchus.
filling defect n.
A defect in the contour of part of hollow viscus, as seen by x-ray after contrast medium has been introduced, indicating the presence of a tumor or foreign body.
-the example sentence incorrectly describes an endoluminal lesion as a filling defect. Something has to be filled to see a filling defect. Airways are empty.