Optimizing utilization of kidneys from deceased donors over 60 years: five-year outcomes after implementation of a combined clinical and histological allocation algorithm.

This 5 year observational multicentre study conducted in the Nord Italian Transplant programme area evaluated outcomes in patients receiving kidneys from donors over 60 years allocated according to a combined clinical and histological algorithm. Low-risk donors 60-69 years without risk factors were allocated to single kidney transplant (LR-SKT) based on clinical criteria. Biopsy was performed in donors over 70 years or 60-69 years with risk factors, allocated to Single (HR-SKT) or Dual kidney transplant (HR-DKT) according to the severity of histological damage. Forty HR-DKTs, 41 HR-SKTs and 234 LR-SKTs were evaluated. Baseline differences generally reflected stratification and allocation criteria. Patient and graft (death censored) survival were 90% and 92% for HR-DKT, 85% and 89% for HR-SKT, 88% and 87% for LR-SKT. The algorithm appeared user-friendly in daily practice and was safe and efficient, as demonstrated by satisfactory outcomes in all groups at 5 years. Clinical criteria performed well in low-risk donors. The excellent outcomes observed in DKTs call for fine-tuning of cut-off scores for allocation to DKT or SKT in high-risk patients.

Role of cytomegalovirus and Epstein-Barr virus in patients with de novo colon cancer after renal transplantation.

AIMS: The development of new effective immunosuppressive agents has provided long-term survival for transplant recipients, thereby increasing the risk of de novo malignancy in chronic immunocompromised hosts. Although de novo post-transplant lymphoproliferative diseases and skin cancer have been shown to have an increased incidence in long-term surviving solid organ transplant recipients, the association with colon cancer is controversial. PATIENTS AND METHODS: Over a 12-year period, 20 patients (5%) out of 400 renal transplant recipients (treated at the University Hospitals of Udine and Ancona) developed 24 de novo tumors; 11 skin cancers and 13 non-skin cancers. Three patients developed de novo colon cancer. Immunosuppressive therapy was reduced immediately after diagnosis, and all patients were shifted from cyclosporine to rapamycin within 30 days. The tumor was surgically resected with curative intent in 2 cases, and 1 patient had only palliative surgery due to metastatic disease. The postoperative course was uneventful, and all patients maintained normal graft function. RESULTS: Two of 3 patients died of progression of the neoplasm, within a median time from the diagnosis of 12 months. We analyzed the possible correlations between de novo colon cancer and "serology (hepatitis C virus-hepatitis B virus, HCV-HBV) status" infections, cytomegalovirus and Epstein-Barr virus reactivation, episodes of rejection, and blood transfusions. CONCLUSIONS: Differently from other de novo skin and non-skin tumors, our cases developed cytomegalovirus and Epstein-Barr virus reactivation within 3 months of transplantation. Therefore, we suggest a closer follow-up for de novo colon cancer in renal transplants with early cytomegalovirus and Epstein-Barr virus reactivation in order to avoid a delay in diagnosis.

De novo gastrointestinal tumours after renal transplantation: role of CMV and EBV viruses.

The development of new and more effective immunosuppressive agents has provided long-term survival for transplant recipients, thereby increasing the risk of de novo malignancy in chronic immunocompromised hosts. While de novo post-transplant lymphoproliferative diseases and skin cancer has been shown to have an increased incidence in long-term surviving solid organ transplant recipients, the association with gastrointestinal (GI) cancer is controversial. Over 12 yr, 20 patients (5%) out of 395 renal transplant recipients developed 23 de novo tumours; 11 skin cancer and 12 non-skin cancer. Four patients (1%) developed de novo tumours of the GI tract (three colon, and one gastric cancer). Immediately after tumour's diagnosis, immunosuppressive therapy was reduced; all patients were shifted from cyclosporine to Rapamicine within 30 d. The tumour was surgically resected with curative intent in three cases, while one patient had only palliative surgery because of metastatic disease. The post-operative courses was uneventful. All patients maintained normal graft function. However, three out of four patients (75%) died of progression of the neoplasm, within a median time from the diagnosis of 12 months. Further, we investigated a possible correlations between de novo GI cancer and HCV, HBV status, infections, cytomegalovirus (CMV) and Epstein-Barr virus (EBV) reactivation, episodes of rejection, and blood transfusions. All cases with GI de novo cancers reported in this paper developed CMV and EBV reactivation within three months after transplantation. Thereafter we suggest a closer follow-up for de novo GI cancer in renal transplants with early CMV and EBV reactivation in order to avoid delayed diagnosis.