A 54-year-old member asked:
is tetralogy of fallot hereditary?
1 doctor answer
Dr. Steven Neish answered
37 years experience Pediatric Cardiology
In some families: In some families, there are genetic factors that affect the development of various conotruncal heart defects, which includes tetralogy of fallot. One gene defect that can result in tof is 22q deletion. There is variability in both penetrance (does the disease show up) and expression (the exact way a disease occurs.).
Answered on Aug 10, 2017
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