Tree in bud

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[edit] Discussion

  • The "tree-in-bud" pattern at thin-section computed tomography is characterized by small centrilobular nodules of soft-tissue attenuation connected to multiple branching linear structures of similar caliber originating from a single stalk.
  • This pattern also resembles the small objects used in the childhood game of jacks.
  • Initially described in cases of endobronchial spread of Mycobacterium tuberculosis.
  • The "tree-in-bud" pattern has subsequently been reported as a manifestation of a variety of entities, including:
    • Peripheral airway diseases such as infection (bacterial, fungal, viral, or parasitic)
    • Congenital disorders
    • Idiopathic disorders (obliterative bronchiolitis, panbronchiolitis)
    • Aspiration
    • Inhalation
    • Immunologic disorders
    • Connective tissue disorders
    • Peripheral pulmonary vascular diseases (i.e. neoplastic pulmonary emboli).

[edit] Imaging Findings

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References