harvard chest 6.txt


Fatty mediastinal mass:


mediastinal lipomatosis, hernia, lipoma, liposarcoma, thymolipoma, teratoma


Densely enhancing mediastinal mass:


vascular, hypervascular tumors, goiters, Castleman?s


Cardiophrenic angle mass:


pericardial cyst, Morgagni hernia, lymphoma, mets, lung CA, fat pad (most common)


Cyst:


traumatic cyst, hematoma cyst, bronchogenic cyst, hydatid cyst, emphysematous bullae, bronchiectasis, end-stage interstitial disease, sequestration, CAM, pneumatocele;


small cystic dz


EG, LAM, cystic PCP, honeycombing, emphysema


Cavity:


pyogenic abscess (Staph, Klebsiella, E coli, Pseudomonas, anaerobes), lung CA (usu sq cell), TB, fungus (blasto, cocci, histo), Nocardia, secondary Aspergillus infection of cavity, septic emboli (Staph aureus), mets (usu sq cell), lymphoma (Hodgkin's), rheumatoid nodule, Wegener's, large hiatal hernia, silicosis, lymphomatoid granulomatosis, parasites


Air crescent sign in cavity:


Aspergillus, Mucor, Actinomycosis, septic emboli, Klebsiella, TB, tumors (KS)