Research suggests that the diversity of myeloid cells in tumors is influenced by various factors, including genes, location, and time. Studies have explored the role of myeloid cells in different types of cancer, such as leukemia, melanoma, and glioblastoma, and their interactions with the tumor microenvironment. The findings indicate that myeloid cells play a complex role in shaping the immune landscape of tumors and may contribute to immune evasion and tumor progression.