Living-donor lung transplantation after surgical repair of transposition of the great arteries.

Pediatric pulmonary hypertension after surgery for congenital heart disease is a significant complication. We present a case of living-donor lung transplantation for a 12-year-old girl with pulmonary hypertension after surgical repair of transposition of great arteries. Despite repairing the transposition of great arteries, her growth was severely restricted because of progressive pulmonary hypertension; thus, lung transplantation was discussed. Standard bilateral lobar transplantation seemed unfeasible due to oversized grafts, so we performed a single lobar transplantation. Unexpectedly, she developed complications and died 3 months postoperatively despite another emergent lobar transplantation. We discussed the challenges and potential solutions regarding lobar size mismatching.