Observational studyBMC nephrology2025
Risk of malignant neoplasms of tacrolimus in kidney transplant patients: a retrospective cohort study conducted using the Japanese National Database of Health Insurance Claims.
Observational study in BMC nephrology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAlthough the long-term survival of kidney transplant recipients has significantly improved, malignant neoplasms remain one of the leading causes of death in this population. The recipients face a 1.8-fold increased risk of developing malignant neoplasms compared with the general population. This risk increases with time after transplantation. Tacrolimus (TAC) is preferred over cyclosporine A (CyA) in terms of efficacy against organ rejection, but evidence on the risk of malignant neoplasms is lacking. We aimed to describe the incidence and types of malignant neoplasms in kidney transplant recipients and evaluate the association between malignant neoplasms development and the type of prescribed CNI.
methodsThis retrospective cohort study was conducted using the Japanese National Database of Health Insurance Claims, including data covering 99% of kidney transplant patients in Japan. Patients who underwent kidney transplantation and were prescribed TAC or CyA between April and June 2011 were included. The primary outcome included the incidence of malignant neoplasms, and secondary outcomes included overall survival and graft survival.
resultsA total of 7,590 patients were included, with 11.0% developing malignant neoplasms during the follow-up period. The most common malignant neoplasms were in the digestive organs and urinary tract. No statistically significant difference in malignant neoplasms incidence was observed between TAC and CyA users (hazards ratio: 0.97, 95% CI: 0.84 to 1.12; estimated average treatment effect: -24.05, 95% CI: -184.90 to 136.80). The patient and graft survival rates were also comparable between the groups.
conclusionsThis large study suggests that TAC is not associated with an increased risk of malignant neoplasms compared to CyA in the late post-transplant period. CLINICAL TRIAL NUMBER: Not applicable.
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