October 24, 2010

Centrilobular Nodules with Tree-in-Bud Pattern

Axial CT image shows multiple micronodules in the left lung. Most are not subpleural. They are non-uniform and there are some that have V- or Y shape.

Facts: Centrilobular Nodules
  • Nodules limited to centrilobular structure (central core), sparing pleural surfaces
  • Most peripheral nodules are centered 5-10 mm from fissures or pleural surface
  • Evenly distribulted
  • Common cause: without tree-in-bud - infection, inflammation, hypersensitivity, vascular disease
  • Common cause: with tree-in-bud - infection

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