lung: gallium imaging

• scans at 48 hrs because 50% of normals show activity at 24 hrs

• focal uptake
  • primary pulmonary malignancy
  • benign disorder: granuloma, abscess, pneumonia, silicosis
• multifocal/diffuse uptake
  • infection
    • TB: active lesion, miliary TB, rapidly progressive TB pneumonia
    • PCP: unimpressive symptoms and CXR
    • CMV
  • inflammation: sarcoid, interstitial lung disease (pneumoconiosis, IPF, lymphangitic carcinomatosis), radiation pneumonitis
  • drugs: bleomycin, amiodarone
  • contrast lymphangiography (in 50%)

© 2002, C.E. Kahn, Jr.
2002-04-18