MEN1 and Inherited cancer-predisposing syndrome: Figure 5 shows the trend of the five most numerous themes over the last 11 years. It can be seen that Case Reports is the most studied topic in MEN1. PENTs have also received increasing attention in recent years. In addition, Expression of Menin, Gene Mutation, and Hereditary Cancer Syndrome have also received a lot of attention. It is noteworthy that in the field of MEN1, there were relatively more studies on Gene Mutations in the early years, while declining in recent years.