lung abscess

• Staphylococcus aureus
  • thick wall
  • associated effusion
  • empyema

• Klebsiella pnuemoniae
  • thick wall
  • more common upper lobes
  • usually single but may be multilocular
  • +/- effusion

• tuberculosis
  • thick wall
  • upper lobes and apical segment of lower lobes
  • usually surrounded by consolidation +/- fibrosis

• aspiration
  • look for foreign body

• other
  • Gram negative organisms
  • actinomycosis
  • aspergillosis
  • hydatid
  • amoebiasis
  • histoplasmosis

© 2002, C.E. Kahn, Jr.
2002-04-18