Situs inversus

Situs inversus, short form of the Latin “situs inversus viscerum”, is a term used to describe the inverted position of chest and abdominal organs. It is called situs inversus totalis when there is a total transposition of abdominal and thoracic viscera (mirror image of internal organs normal positioning).

Associations

Situs inversus is usually associated with dextrocardia (true mirror image) with only 3-5% incidence of congenital heart disease, most commonly transposition of the great vessels. Of these patients, 80% have a right-sided aortic arch. Situs inversus with levocardia (which is much rarer: 0.00005%) congenital heart disease is found in 95% of patients 4.

Up to 20% of patients with situs inversus can have Kartagener syndrome 3 which comprises a subgroup of primary ciliary dyskinesia.

Imaging features on chest radiograph to be evaluated are:

  • location of heart apex
  • location of aortic arch
  • location of stomach bubble / liver
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Article Information

rID: 2054
Systems: Vascular, Chest
Sections: Anatomy, Approach
Synonyms or Alternate Spellings:

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Cases and Figures

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    Case 1: X-ray
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    Frontal radiograph.
    Case 2
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    Case 3: ultrasound
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    Case 4: CT
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    Truncus arteriosu...
    Case 5: with concurrent congenital cardiac anomaly
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    PA
    Case 6: with Kartagener syndrome
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    Case 7
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    Dextrocardia
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    Case 9
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     Case 15
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    Case 16
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    Prone adquisition
    Case 17: situs inversus totalis
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    Case 18
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    Case 19: with gallstone ileus
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    Case 21: situs inversus totalis with left azygos fissure
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