CHORUS

Collaborative Hypertext of Radiology

Respiratory system

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upper/lower lobe predominance

• upper lobe
  • usually site of gtr disease d/t poorer clearance
  • bronchogenic Ca
  • pneumoconioses
  • histiocytosis X
  • sarcoidosis
  • ankylosing spondylitis

• lower lobe
  • scleroderma

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