Differentials in Chest

Acute Alveolar Infiltrate:
- Pulmonary Edema
- Pneumonia
- Hemorrhage
- Aspiration

Chronic Alveolar Disease:
- Alveolar cell carcinoma
- Alveolar Sarcoidosis
- Alveolar Protienosis
- Lymphoma

Anterior Mediastinal Masses:
- Thymoma
- Thrytoid (retrosternal)
- Teratoma
- Lymphoma

Middle Mediastinal Masses:
- Lymphadenopathy
- Aortic Aneurysm
- Esophageal Duplication cyst
- Bronchial cyst

Posterior Mediastinal Masses:
- Neurogenic Tumors
- Lymphadenopathy
- Extramedullary Hematopiesis

Opacified Hemithorax:
- Atelectasis
- Effusion
- Pneumonia
- Post-pneumonectomy

Bibasilar Interstitial Disease:
- Bronchiectasis
- DIP
- Asbestosis
- Sarcoidosis
- Aspiration
- Scleroderma

Chronic Interstitial Disease:
- Pneumoconiosis
- Interstitial Pneumonia
- Granulomatous disease
- Collagen Vascular Disease
- Idipathic Fibrosis
- Neoplastic disease

Micronodular Lung Disease:
- Miliary TB
- Pneumoconiosis
- Sarcoidosis
- Metastasis

Cavitary Lung Lesions:
C Cancer (squamous cell carcinoma, melanoma, sarcoma mets)
A Autoimmune (Wegener's granulomatosis, rheumatoid lung)
V Vascular (ie bland or septic emboli)
I Infection (TB, fungal (coccidioidomycosis, aspergillosis), bacterial (Staph, strep, Klebsiella))
T Trauma
Y Youth (ie congenital: bronchogenic cyst, sequestration)

Large Cavitary Lesions:
- TB
- Cancer Lung
- Abscess

Small Cavitary Lung Nodules:
- TB
- Rheumatoid nodules
- Septic Emboli
- Transitional or Squamous cell metastasis
- Wegner's Granulomatosis

Multiple Lung Nodules:
- TB
- Wegner's Granulomatosis
- Rheumatoid nodules
- AVMs
- Metastasis
- Septic Emboli

Masses with Airbronchograms:
- Alveolar Cell carcinoma
- Lymphoma
- Pseudo-lymphoma

Small Calcifications in Lungs:
- Alveolar Microlithiasis
- Silicosis (upper)
- Histoplasmosis
- Varicella Pneumonia (healed)

Cavities Containing Masses:
- Aspergillomas
- Hydatid Cyst
- Carcinoma

Masses that Cavitate:
- Metastatic masses
- Wegner's G
- Rheumatoid
- Septic Emboli

Infiltrates with Effusion:
- TB
- Staph Pneumonia
- Strept Pneumonia
- Pulmonary Infarction

Cystic Lung Lesions:
L  Lymphangioleiomyomatosis, Lymphocytic interstitial pneumonia, Langerhans Cell Histiocytosis
I  Infection (TB, Staphylococcus, PCP)
S Sarcoid
T Tuberous sclerosis