Objective To investigate the incidence of de novo malignant tumors of the digestive system after liver transplantation (LT) in China.
Methods Relevant literature review was performed from Wanfang data, China National Knowledge Infrastructure (CNKI) and Chongqing VIP. The retrieval time started from the establishment of each database to May 9, 2019. The Chinese search terms were liver transplantation+ postoperative/de novo+ malignant tumor/cancer. The age distribution, sex composition, time of diagnosis, involved organs, treatment and clinical prognosis of recipients with de novo malignant tumors of the digestive system after LT in China were retrospectively analyzed.
Results After literature screening, 16 articles were eventually selected including 47 cases of de novo malignant tumors of the digestive system after LT. A majority of them were male recipients. The age of the recipients was 51 (23-65) years old, most of them were middle age (45-59 years old). The average time of diagnosis of de novo malignant tumors of the digestive system after operation was 43 (2-156) months, with the highest number of cases within postoperative 1-3 years. Colon and stomach were the most common tumor sites. Surgery combined with radiotherapy and chemotherapy remained the main treatment option. However, the overall clinical prognosis of patients with de novo malignant tumors of the digestive system after LT was poor with a mortality rate of 51%.
Conclusions In China, colon cancer and gastric cancer are the main de novo malignant tumors of the digestive system after LT. The overall clinical prognosis of patients with de novo malignant tumors of the digestive system is poor. Sufficient attention should be paid to postoperative monitoring and prevention.
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