Tumor causing hypocytosis exists clinically, especially if the tumor is combined with bone marrow infiltration, which can lead to thrombocytopenia, or even combined with anemia or whole blood cytopenia, when not only the platelets are hypotensive, but also anemia and leukopenia. In chronic DIC, platelet depletion increases, which can also lead to platelet depletion. This is often combined with skin and mucous membrane bleeding, gum bleeding, and in severe cases, blood in the stool or urine. Other factors may include chemotherapy leading to platelet depletion, etc. In short, tumors may cause low platelets.