Fig. 1

Relationship between P.gingivalis and gastrointestinal cancers. Studies have confirmed that P. gingivalis could promotetumor progression (red lines). Studies have shown that P.gingivalis may promote tumor progression (blue lines). P.gingivalis may be associated with tumors (yellow lines). Whether P. gingivalis is related to the tumor is currently unclear (black lines). (Some of the color images in Fig. 1 come from the network, and the purpose is only to explain the relationship between P.gingivalis and gastrointestinal cancers)