Cancers of new appearance in liver transplant recipients:: Incidence and evolution

Objective. To investigate the incidence, time of appearance, treatment, and evolution of tumors appearing in liver transplant recipients at our hospital. Material and methods. We undertook a retrospective analysis of our series of liver transplants between 1990 and 2005. Patients who died during the immediate postoperative period were excluded. Results. Of the 515 patients, 25 died during the immediate postoperative period and therefore had no occasion to develop neoplasms. Of the remaining 490, 32 developed cancers (6.5%). The average age was 55.4 +/- 7.17 years. The reasons for transplant were alcoholic cirrhosis (n = 15), hepatitis C virus (2), hepatitis B virus (n = 1), alcoholic and viral cirrhosis (n = 7), primary biliary cirrhosis (n = 1), and cryptogenic cirrhosis (n = 1). Four patients developed multiple neoplasms. Most of the tumors were cutaneous: nine basal cell and six squamous cell carcinomas. Other locations were the lung, urothelium, stomach, thyroid, and brain. Eight patients presented metastasis at the time of diagnosis. The average tumor-free period was 3.36 years. Nine patients died as a result of the tumor. Discussion. Patients with a liver transplant have a high risk of developing cancers as a result of the immunosuppression treatment, which is lifelong. Nevertheless, other factors' can be involved, such as infection by cytomegalovirus or the original diagnosis leading to transplantation. The risk for developing cancers is significantly greater than in the general population, with a higher tendency to recurrence and later development of second neoplasms.