Hydatid cyst signs

Dr Dan J Bell and Dr Jeremy Jones et al.

There are several signs in hydatid cyst seen associated with hydatid disease:

  • cumbo sign: air is seen between the pericyst and the laminated membrane of the cyst 
  • serpent sign: internal rupture of the cyst with collapse of membranes of the parasite into the cyst
  • spin sign / whirl sign: detached membranes with small pleural reaction seen in hydatid cyst of lung
  • empty cyst sign: may be seen after complete evacuation of parasitic membranes
  • crescent sign: a crescent-shaped rim of air at the lower end of the cyst (inverse crescent sign)
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Article information

rID: 19631
System: Chest
Section: Signs
Synonyms or Alternate Spellings:
  • Signs associated with hydatid disease

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