Talbot, Simon

Under the auspices of the International Society of Vascularized Composite Allotransplantation (ISVCA), a section of the Transplantation Society (TTS) that promotes and encourages research and training in the field of vascularized composite allotransplantation (VCA), the 4th Chauvet Workshop was convened in conjunction with the biennial meeting of the ISVCA from 27–29th June 2025 in Helsinki, Finland. The Chauvet workgroup recognizes the importance of psychological evaluation and management in VCA and works to provide an interdisciplinary platform for the development of psychosocial guidelines for the field. For the first time this workshop was conducted jointly with the ISVCA biennial congress, facilitating wider attendance, and discussions between different units and across disciplines. Three main areas were discussed; outcomes and lessons learned, qualitative research approaches and patient reported outcome measures (PROMS), and the role of team science in complex care models. We also heard an update from patient advocate Vasyly Rohovyy, on the progress being made to develop a VCA patient support and advocacy community. Here we summarize these discussions.

Background. Chronic kidney disease (CKD) is a common complication of nonrenal transplantation, influencing recipients’ morbidity and mortality. The incidence of CKD varies depending on the transplanted organ. Recipients of vascularized composite allotransplantation (VCA) need lifelong immunosuppression similar to that of solid organ transplantation. This study investigated renal function in VCA recipients. Methods. We studied 70 recipients from 17 centers (median follow-up: 8 y): 59 upper extremity, 10 face, and 1 penis transplant. Pretransplant and posttransplant clinical data and sera were collected to calculate the estimated glomerular filtration rate (eGFR) using the CKD Epidemiology collaboration 2021 formula. Results. Pretransplantation, the median eGFR was 105.36 mL/min (range, 71.39–155.39 mL/min). By 3 mo posttransplant, the eGFR had significantly decreased to 78.42 mL/min (range, 32.49–130.74 mL/min; P = 0.001) before stabilizing. Despite higher tacrolimus levels at 3 mo, no correlation with eGFR was found. During follow-up, 17.1% of patients experienced a ≥50% eGFR decline, 10.9% progressed to CKD, and 4.7% developed end-stage kidney disease. Some risk factors were identified, but their responsibility could not be established with certainty because of the low number of severe renal outcomes. Conclusions. Renal function declines in the majority of VCA recipients, but the function loss is lower compared with nonrenal solid organ transplantation recipients. Although no statistically significant correlation could be established between tacrolimus exposure and renal function decline, strategies aiming at minimizing calcineurin inhibitor exposure and avoiding other nephrotoxic causes are recommended to preserve long-term kidney function.