1) anterior mediastinal mass- thymoma,lymphoma,teratoma,substernal thyroid

2)pneumomediastinum- ruptured oesophagus, ruptured trachea or bronchus , pneumoperitoneum,asthma, iatrogenic

3)small cavitatory lung lesions- septic emboli , rheumatoid nodules , squamous or transitional cell metastasis,wegener's granulomatosis

4) upper lobe disease - tb , silicosis ,eosinophilic granuloma , ankylosing spondylitis

5)large cavitatory lung lesions - abscess , carcinoma , tb

6) c/c alveolar disease- alveolar cell carcinoma , alveolar sarcoid , lymphoma , alveolar proteinosis

7)micro nodular lung disease- metastasis , sarcoid , pneumoconiosis , miliary tb

8)bibasilar interstitial disease- bronchiectasis , aspiration , asbestosis , sickle cell disease , scleroderma

9)opacified hemithorax-atelectasis , pleural effusion ,pneumonia , post pneumonectomy

10)acute alveolar infiltrate- pulmonary oedema , pneumonia , aspiration , hemorrhage

11)multiple lung nodules- metastasis , wegener's granulomatosis , rheumatoid nodules , septic emboli

12)pulmonary interstitial oedema - chf , lymphangitic spread , allergic reaction

13)shifting infiltrates- loeffler's syndrome , asthma , polyarteritis , viral pneumonia

14)lymphangitic spread to lungs- lung ca , breast ca , stomach ca , pancreas ca , laryngeal ca , cervical ca

15)middle mediastinal mass- lymphadenopathy , aneurysms , esophageal duplication , bronchogenic cysts

16)unilateral hyperlucent lung- swyer james syndrome , pulmonary embolism , pneumothorax , obstructive emphysema

17)cavitatory pneumonia - staphylococcus , streptococcus , tb , gr negative- klebsiella

18)rapidly clearing alveolar infiltrate- hemorrhage , pulmonary edema , aspiration , pneumococcal pneumonia

19)hilar adenopathy-sarcoid , tb, lymphoma , bronchogenic carcinoma , mets

20)cavities containing masses- aspergillosis , cavitating bronchogenic carcinoma , mets

21) posterior mediastinal mass- neurogenic trs, lymphadenopathy , extra medullary hematopoesis

22)mediastinal adenopathy- bronchogenic carcinoma , lymphoma , tb , mets , sarcoid

23)pleural calification- old tb empyema , asbestos exposure , hemothorax

24 )masses in cardio phrenic angle- sequestration , diaphragmatic hernia , pericardial cyst

25)lung disease with rib destruction- pancoast tr , actinomycosis , blastomycosis , multiple myeloma