Tuesday, May 19, 2009

The Solitary Pulmonary Nodule



An Approach to the solitary pulmonary nodule.....

Differential Diagnosis:

  • Malignant: can be primary (adenoCa, squamous, large cell, or small cell), or metastatic
  • Infectious: Granuloma from TB or fungal infection (eg. histoplasmosis, coccidiomycosis), abscess, aspergilloma
  • Vascular: arteriovenous malformation, infarction
  • Inflammatory: Wegener's granulomatosis, rheumatoid nodule
  • Benign neoplasm: hamartoma, lipoma
Risk Factors for Malignancy:
  • Size greater than 3 centimeters
  • spiculated border
  • "eccentric" calcification pattern (see above image; calcium deposition is off-centre)
  • doubling time of the nodule is between 20 and 400 days
  • Clinical clues: constitutional symptoms, smoking history
As always:
  • Take a good history and physical exam
  • Get an old Chest X-ray
  • If you susptect malignancy: Get a tissue sample with Bronchoscopy vs Video-Assisted Thorascopic Surgery vs Open Thorascopy
A good link:

2 comments:

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