The International Labour Office categorises this condition based on the size of the shadowing produced by these masses on chest radiograph.
A : diameter of opacities greater than 1 cm but less than 5 cm
B : opacities with diameter greater than 5 cm but occupying less than a third of right lung field area
C : opacities with diameter greater than 5 cm and occupying more than a third of right lung field area
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.