DDx ⬇
- Pneumonia
- Tuberculosis
- Metastatic cancer to lung
- Benign pulmonary nodule or nodules
- Lymphoma
- MAC (Mycobacterium avium complex)
- Sarcoidosis
- Fungal pneumonia
- Carcinoid tumor (bronchial carcinoid tumor)
- Foreign-body aspiration (retained)
Related DDx ⬆ ⬇
Etiology ⬆
- Squamous cell (25-35%)
- Adenocarcinoma (35-40%)
- Bronchioloalveolar cell (2%, subset of adenocarcinoma)
- Large cell (5-10%)
- Small cell (15-20%)