MO959KIDNEY TRANSPLANT TRANSITION FROM PEDIATRIC TO ADULT FACILITY CARE: DIFFICULTIES AND RISK FACTORS
Authors: Tinti Francesca , Salomone Luca , Ferrannini Michele , Noce Annalisa , Mazzaferro Sandro , Dello Strologo Luca , Mitterhofer Anna Paola 
Published: May 2021

Abstract

Background and Aims
Kidney transplantation (KTx) in pediatric ages is successful, leading to optimal patients and graft survival with indication, in adolescent age, to transition toward an adult transplant facility. To date, the transition process of adolescents and young adults with KTx is not well defined.
Transfer to a different medical facility marks a vulnerable phase in the adolescents’ lives with an increased risk for non-adherence and allograft failure. Some studies report unexpected loss rates in kidney grafts as high as 24%–42% within 3 years after transfer. In addition, some studies show that the age ranging from 18 to 26 years is the age in which graft losses are most concentrated, an age that coincides with the transition.
Several makers have been shown to influence non-adherence rate in kidney transplanted patients during transition: a bad doctor-patient relationship, the absence of specialized centers capable to face these particular needs and care requests, the lack of psychological support, and a low availability of specialized nurses. Moreover, many patients are lost to follow-up as the result of breakdowns in the transition and transfer to adult medical care.

Method
In this study we enrolled patients transited from the pediatric transplant Centre to the adult transplant nephrological facility between 2017 and 2020. Data of KTx, baseline renal disease, post-transplant medications and post-transplant complications were recorded.
Follow-up of renal function were performed and analyzed during the transition process and forward during the adult follow-up.

Results
Data of 19 patients (pts) were analysed. Six were male (31.6%) and 13 female (68.4%). The cause of renal dysfunction was malformations in 10 patients (52.6%), glomerulonephritis (GN) in 5 pts (26.3%) and genetic syndromes in 4 pts (21.1%). They received the kidney transplantation at a median age of 12 years [IQR 10-18]. Median age at transition resulted 31 years [interquartile range (IQR) 30-33]. Seven pts (36.8%) had a history of post-transplant lymphoproliferative disease (PTLD). All patients were receiving steroids, 11 pts (57.9%) cyclosporine A and 8 pts (42.2%) tacrolimus; only 9 pts (47.4%) were receiving mycophenolate or azathioprine. The median follow-up at the adult Transplant Centre was 1 year [IQR 1-2]. After transition, five patients experienced complications: 2 pts developed PTLD de novo, 2 pts had a recurrence of native GN after reduction of immunosuppression for PTLD and pregnancies (one pt underwent re-tx), 1 pt experienced an acute cellular rejection after transition to another Centre and is developing ESRD. The median eGFR slightly decreased from baseline at transition to the last follow-up (80 ml/min/1.73 m2 at baseline [55-112]; 74 ml/min/1.73m2 at last follow-up [35-98]) but this was not significant (p=0.127).

Conclusion
Our results confirm that the transition from pediatric to adult transplant Centre is not a simple process.
Several factors linked to the patient and to the kidney have to be considered in the development of post-transplant complications: the age of transplantation with long term immunosuppression; infections typical of pediatric ages that may develop in adulthood, such as EBV, that force to modulate immunosuppression exposing the patient to increased risk of rejection or recurrence of native disease; the exposure to different immunological stimuli and physiological events such as pregnancies in female patients.
These patients may develop complications linked to non-adherence and low compliance to immunosuppressive medications, but also complications typical of adult age, like arterial hypertension, obesity, diabetes, and dyslipidemias.
Therefore, defining effective practices for recipient transition and transfer from pediatric to adult medical care are essential to optimize the KTx patients follow-up and outcome.