Whether stomach cancer has black stool has no correlation with whether it is in advanced stage or not, black stool is just a symptom, it is not only appeared in stomach cancer, it indicates the existence of bleeding in middle and upper gastrointestinal tract, even if there is inflammation of small intestine with blood seepage, black stool can also appear, it is not necessarily correlated with stomach cancer. It is not necessarily related to stomach cancer. Even if stomach cancer has black stools, it only indicates that there may be certain gastrointestinal bleeding, but it is not in the advanced stage. Whether stomach cancer is in advanced stage mainly depends on whether it has metastasis, such as extra-regional lymph node metastasis and distant organ metastasis, if these situations occur, it is in advanced stage. Early stomach cancer can also have gastrointestinal bleeding and produce black stools, so there is no necessary relationship between stomach cancer and black stools and the stage.