Background
With the growing numbers of liver transplant recipients, it is increasingly important to understand the risks of de novo malignancy after liver transplantation.
Aim
To characterize the incidence of de novo malignancy after liver transplantation compared to a control non-transplant population.
Methods
We studied 534 Indiana state residents undergoing liver transplantation at our center between 1997 and 2004, followed through August 2010 The incidence and predictors of malignancy were determined. The standardized incidence ratio (SIR) of cancer in our cohort was compared to age, gender and period matched state population using the Indiana State Cancer Registry.
Results
After a mean follow up of 5.7 ± 3.2 years, 73 patients (13.7%) developed 80 cancers, with 5 and 10 year incidence rates of 11.7%, and 24.8%, respectively. These included 24 (30%) skin, 16 (20%) hematologic and 40 (50%) solid tumors. The most common solid cancers were aerodigestive. Compared to matched state population, liver transplant recipients had significantly higher incidence of all cancers (SIR:3.1, 95%CI:2.9–3.2), skin (melanoma) (SIR:5.8, 95%CI:4.7–7.0), hematologic (SIR:7.1, 95%CI:6.3–8.0), and solid (SIR:2.7, 95%CI:2.5–2.8) tumors.
Conclusion
There is a significantly increased risk of de novo malignancies after liver transplantation, highlighting the need for surveillance strategies in this population.