Pulmonary hydatid infection

Pulmonary hydatid infection is a common manifestation of hydatid disease.

The lung is the second most common site of involvement with echinococcosis  granulosus in adults after the liver (10-30% of cases), and the most common site in children1. The coexistence of liver and lung disease is present in only 6% of patients 2.

Thoracic involvement may occur via1:

  • transdiaphragmatic route  (0.6-16% of cases of hepatic disease)
  • haematogenous spread

Although the echinococcosis granulosus presents commonly with unilocular cysts, echinococcosis multilocularis and echinococcosis vogeli may cause alveolar and polycystic echinococcosis.

Chest CT scan features include 2:

  • multiple or solitary cystic lesion (most common)
  • diameter of 1-20 cm
  • unilateral or bilateral
  • predominantly found in the lower lobes

Radiographic and CT features may differ in complicated and uncomplicated cysts.

Uncomplicated cysts are characterized by:

  • round or oval masses with well-defined borders
  • enhancement after contrast injection
  • hypodense content relative to the capsule

Complicated cysts may show:

Other less common thoracic hydatid manifestations include: invasion of the mediastinum 4, pericardium, chest wall 5, cardiovascular system, or inferior vena cava 6.

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Article information

rID: 21006
System: Chest
Section: Pathology
Synonyms or Alternate Spellings:
  • Pulmonary hydatid infections
  • Pulmonary hydatid disease
  • Pulmonary manifestations of hydatid disease

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Cases and figures

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    Case 1
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    Case 2: hepatic and pulmonary hydatid cysts
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    Case 3: large pulmonary hydatid cyst
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    Case 4
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    Case 5: hepatic, splenic and pulmonary hydatid cysts
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    Case 6
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    Case 7
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    Case 8
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    cavitary lesion w...
    Case 9: complicated cyst
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    High signal inten...
    Case 10: on MRI
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    Case 11: pleural hydatid cysts
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