# Navigating complex clinical decisions: kidney transplantation following abdominal aorto-aortic bypass in infantile Takayasu arteritis

## TL;DR

A young boy with infantile Takayasu arteritis successfully underwent kidney transplantation after major vascular surgery, showing long-term remission.

## Contribution

This is one of the youngest reported cases of successful kidney transplantation in infantile Takayasu arteritis following vascular surgery.

## Key findings

- The patient maintained excellent kidney graft function 18 months post-transplant.
- No signs of TAK recurrence were observed after transplantation.
- The case highlights the potential for successful transplantation under standard immunosuppression without anti-TNFα.

## Abstract

Takayasu arteritis (TAK) is a granulomatous large-vessel vasculitis typically affecting young adult females. Pediatric cases are rare, and infantile onset is exceptional. Management relies on immunosuppression, with surgery reserved for severe complications.

We describe a now 5.5-year-old boy diagnosed with TAK at six months of age, presenting with hypertensive encephalopathy and kidney dysfunction. Despite treatment with corticosteroids and anti-TNFα, his kidney function deteriorated, leading to kidney failure and dialysis. At nearly three years of age, he underwent abdominal aorto-aortic bypass and bilateral nephrectomy due to progressive vascular narrowing and refractory hypertension. At age four, he successfully received a deceased-donor kidney transplant. Eighteen months post-transplant, he maintains excellent graft function and shows no signs of TAK recurrence.

This case underscores the complexity of diagnosing and managing infantile TAK with multiorgan involvement. To our knowledge, he is among the youngest reported TAK patients to undergo successful kidney transplantation following major vascular surgery. His course demonstrates the potential for long-term remission and safe transplantation under standard immunosuppression, without continued anti-TNFα therapy. The literature is sparse regarding kidney failure and transplantation in TAK, particularly in infants.

This case highlights key management dilemmas in infantile TAK, including clinical diagnosis, timing of surgery and transplantation, choice of immunosuppression, and long-term monitoring. It emphasizes the importance of a multidisciplinary approach and the need for collaborative research to address knowledge gaps in this rare but complex condition.

A higher resolution version of the Graphical abstract is available as Supplementary information

A higher resolution version of the Graphical abstract is available as Supplementary information

The online version contains supplementary material available at 10.1007/s00467-025-06932-w.