3. CONCLUSION
This case of TOF-type APVS with
was diagnosed at 14 weeks of gestation with an obvious PDA. 15 days
later, the PDA narrowed down together with ectasia of PA. This progress
indicated that the absent of PDA is not necessary for the survival of
TOF-type APVS in utero, in contrast, the absent or restriction of PDA
may be nothing less than adaptation to the disease. 20p12 deletion was
found in this fetus. Prenatal diagnosis in early stage is conducive to
reasonable clinical decision-making.