What is a lung nodular density?

Whitish spot on xray: On a chest x-ray, sometimes there are whitish spots that aren't supposed to be there in the normally dark images of the lungs. The spots are usually less than an inch wide, and often less than half-an-inch wide. Disorders that show up as a nodular density or multiple densities include infections (such as TB or other germs), fungi (such as aspergillus), inflammatory disorders, cancers, etc...