Test Findings
 

Pulmonary Mass

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Overview

  • Pulmonary nodules are commonly seen on chest x-rays, and solitary nodules are often benign.
    • Look For

    • Number of nodules
    • Size of nodules
    • Border - smooth or irregular
    • Density - solid or ground glass
    • Speed of progression
    • Causes of Pulmonary Nodule

    • Benign

    • Granuloma
    • Hamartoma
    • Infection - abscess, organising pneumonia, fungal infection, tuberculosis, septic emboli
    • Inflammation - sarcoidosis, rheumatoid lung disease, granulomatosis with polyangiitis
    • Vascular - pulmonary infarction
    • Malignant

    • Primary lung cancer
    • Metastasis
    • Lymphoma
    • Interpretation

    • Solidary pulmonary nodule - more likely to represent a granuloma, however may be due to lung cancer or abscess
    • Multiple pulmonary nodules - suggestive of metastases, tuberculosis, septic emboli or inflammatory disease
    • Small (<5mm) nodule - more likely to be benign
    • Smooth border - more likely to be benign
    • Irregular or spiculated border - more likely to be malignant
    • Solid nodule - more likely to be benign
    • Ground glass appearance - more likely to be malignant
    • Rapidly enlarging nodule - more likely to be malignant 
    • Examples

    • A granuloma in the right lower zone
    • A granuloma in the right lower zone
       
    • A right hilar mass
    • A right hilar mass
       
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