Correct!
4. 1 and 2
The frontal chest radiograph shows a prominent linear pattern throughout the lungs- this linear pattern represents interlobular septal thickening. The interlobular septal thickening is evident in the perihilar regions, but also as 1-2 cm long, perpendicular lines in contact with the peripheral lateral chest wall- this latter description is that of Kerley’s B lines. In essence, Kerley’s B lines represent peripheral interlobular septal thickening, so both choices a and b are correct. The patterns is a linear one, not a series of “crisscrossing” lines, creating a net-like appearance, so the term “reticulation” here is not an appropriate descriptor.
Which of the following represent the most appropriate differential diagnostic consideration for the chest radiographic pattern present? (Click on the correct answer to proceed to the fourth of eight pages)