CT scan at the level of the right pulmonary artery shows a mass in the superior segment of the left lower lobe characterised by a c shaped or crescent shaped anterior rim of air with ball of soft tissue with calcification, reminiscent of the crescent sign most characteristic of an aspergillus infection of a cavity and resulting in an aspergilloma. Ashley Davidoff MD
Infiltrative Disease
Amyloidosis
Amyloid Involving the Smaller Airways (bronchocentric amyloid) CT scan shows a calcified right apical focus of amyloidosis shown to be PET positive Ashley Davidoff TheCommonVein.net b11635
