Bat wing opacities (lungs)

Bat's wing or butterfly pulmonary opacities refer to a pattern of bilateral perihilar shadowing. It is classically described on a frontal chest radiograph but can also refer to appearances on chest CT 3-4.

Differential diagnosis

Bat's wing pulmonary opacities can be caused by:

Inspired signs
Share Article

Article Information

rID: 972
Systems: Chest, Oncology
Sections: Signs, Gamuts
Synonyms or Alternate Spellings:
  • Bat wing opacity
  • Bat wing pulmonary opacities
  • Bat's wing opacity
  • Bat's wing pulmonary opacity
  • Batwing pulmonary opacities
  • Butterfly opacities (lungs)

Support Radiopaedia and see fewer ads

  • Drag
    Fruit bat
    Figure 1: fruit bat
    Drag here to reorder.
  • Drag
    Pulmonary oedema
    Case 1: pulmonary oedema
    Drag here to reorder.
  • Drag
    Case 2: pulmonary haemorrhage
    Drag here to reorder.
  • Drag
    Case 3: pulmonary oedema
    Drag here to reorder.
  • Drag
    Case 4
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.