Situs ambiguous, asplenia syndrome with bilateral right sidedness

Discussion:

Heterotaxy syndrome is the presence of certain organs forming on the opposite side of the body. It may affect the heart, liver, lungs, intestines, and spleen, yet the first identification in babies with heterotaxy syndrome is usually by problems with their hearts or livers. 

It has no sex predilection and the heart is involved about 80% of cases. The etiology is not yet known. Few cases were reported to have some familial linkage.

Findings may include (all imaging findings need not be present):

  • Thoracic: bilateral right sidedness, dextro- meso- or levocardia, bilateral SVC, absent coronary sinus and multiple associated congenital heart diseases.
  • Abdominal: transverse liver, splenic agenesis, left sided stomach (with dextrocardia), right sided stomach (with levocardia) or midline stomach. 
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