The treatment of choice for recurrent COA (after surgical repair) in a preschool-aged child:
A. Resection and primary anastomosisChildren younger than 6 months with native COA should be treated with surgical repair, while those requiring intervention at later ages may be ideal candidates for balloon dilatation or primary stent implantation. Additionally, catheter-based therapy should be employed for those cases of restenosis following either surgical or primary endovascular management.