In the middle stage of gastric horn cancer, after complete surgical resection, there exists the possibility of metastasis due to continued dissemination. Regular review is needed to recognize the recurrence in time.
The main reason why cancer cells have the possibility of recurrence lies in the infiltration and invasion ability of cancer cells themselves. The cancer cells can invade the surrounding tissues directly or invade the blood vessels and lymphatic vessels to cause distant metastasis.
At the time of surgery, the tumor as seen by the naked eye and enough normal tissue around the tumor can be removed to reduce the direct invasion of the cancer cells, but there is still a chance of distant metastasis. It may lie in the fact that a small number of cancer cells have already metastasized in the blood or lymphatic channels, or that some of the cancer cells have invaded beyond the normal resection area and have not been recognized.
Because screening for microscopic cancer cells is difficult, there are no tests that can identify metastases from small numbers of cancer cells.