Owoyemi, Itunu

Background Immune checkpoint inhibitors (ICIs) have revolutionized cancer therapy, but to the authors' knowledge, limited data exist regarding the safety and efficacy of these agents in transplant recipients. Herein, the authors have reported their experience with 17 patients who were treated with ICIs for metastatic malignancies after undergoing solid organ transplantation. Methods Data were abstracted for solid organ transplant recipients who received ICIs for the treatment of malignancy between January 1, 2016, and September 30, 2019. The authors identified 7 kidney, 8 liver, and 2 heart transplant recipients. Outcomes of interest were adverse drug reactions, cancer progression, and patient survival. Results The most common malignancies treated with ICIs were metastatic squamous cell carcinoma (5 patients; 29%) and hepatocellular carcinoma (5 patients; 29%), which were noted exclusively among liver transplant recipients. The median duration on ICIs was 1.7 months (interquartile range, 0.4‐7.6 months). Five patients (29%) developed adverse reactions, including 4 patients (24%) with immune‐related adverse events(irAEs), 3 patients (18%) with acute allograft rejections, 1 patient (6%) with autoimmune colitis, and 1 patient (6%) with ICI‐induced cardiotoxicity (the patient was a heart transplant recipient). The cumulative incidence of cancer progression was 50% and 69%, respectively, at 6 months and 12 months. Eleven patients (65%) died over the median follow‐up period of 4.6 months (interquartile range, 1.5‐13.2 months) from the time of ICI initiation, with cancer progression being the most common cause of death. Conclusions ICIs can be used as individualized therapy in selected patients who have undergone solid organ transplantation but more studies are needed to determine how best to use these agents to improve outcomes further.

Multiple myeloma is the most frequent malignant monoclonal gammopathy and the second most common hematological malignancy after non-Hodgkin lymphoma. There continues to be evolving therapies in the treatment which has significantly changed progression-free and overall survival of the patients. Increasingly, evidence shows that multiple myeloma no longer portends poor and lethal prognosis. With the advances in treatment of multiple myeloma and improved survival as seen in several studies, perhaps more attention should focus on kidney transplantation in these individuals given their suboptimal outcomes on dialysis. We would like to propose that a diagnosis of multiple myeloma not be considered as an absolute contraindication for kidney transplantation. Rather, a careful consideration of kidney transplantation is appropriate for a subset of patients with multiple myeloma and end-stage kidney disease. The candidacy of these patients should be reviewed by a multidisciplinary team comprising experts in hematology, kidney transplantation, and key stakeholders (including laboratory medicine, renal pathologists, and pharmacists) to allow appropriate risk stratification, prognostication for a successful and safe kidney transplantation.