Some Causes of a Solitary Pulmonary Nodule
Cause | Examples |
|---|---|
Malignant causes* | |
Primary lung cancer | Adenocarcinoma Small cell carcinoma |
Metastatic cancer | Sarcoma |
Nonmalignant causes | |
Autoimmune disorders | |
Benign tumors | Fibroma Hamartoma Lipoma |
Granulomatous infection | Atypical mycobacterial infection Tuberculosis (TB) |
Infection | Bacterial abscess Dirofilariasis (dog heartworm infection) Echinococcus cyst Pneumocystis jirovecii infection |
Pulmonary vascular abnormalities | Cavernous angioma Hemangioma Pulmonary arteriovenous malformation Pulmonary telangiectasis |
Other | Bronchogenic cyst Hematoma Intrapulmonary lymph node Loculated fluid Mucoid impaction Rounded atelectasis |
* The likelihood of a malignant cause increases with age. | |
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