Macrophages are innate immune cells that play critical roles in immune responses and tissue homeostasis. They can be polarized into two main phenotypes: M1 (pro-inflammatory) and M2 (anti-inflammatory). In tumors, macrophages are predominantly M2, creating an immunosuppressive environment that supports tumor growth, angiogenesis, metastasis, and immunosuppression. Tumor-associated macrophages (TAMs) also interact with cancer stem cells, promoting tumorigenesis and drug resistance. TAMs secrete cytokines, chemokines, and proteases that facilitate tumor progression. TAMs are influenced by the tumor microenvironment, which includes chemokines like IL-4, IL-13, TGF-β, and IL-10, leading to M2 polarization. TAMs contribute to tumor progression by promoting angiogenesis, lymphangiogenesis, tumor growth, metastasis, and immunosuppression. They also suppress immune responses by secreting IL-10, TGF-β, and arginase 1, which inhibit cytotoxic T cells and NK cells. TAMs can be targeted for therapy by modulating their polarization, such as converting M2 to M1 macrophages, or by inhibiting their recruitment and activity. Therapeutic strategies include anti-angiogenic drugs, anti-macrophage agents, and immunomodulatory approaches. TAMs also play a role in tumor metastasis by facilitating cell migration and promoting the expression of matrix metalloproteases. Understanding TAMs' role in tumor progression is crucial for developing effective therapies. Targeting TAMs may provide novel approaches for cancer treatment by altering the tumor microenvironment and enhancing immune responses.Macrophages are innate immune cells that play critical roles in immune responses and tissue homeostasis. They can be polarized into two main phenotypes: M1 (pro-inflammatory) and M2 (anti-inflammatory). In tumors, macrophages are predominantly M2, creating an immunosuppressive environment that supports tumor growth, angiogenesis, metastasis, and immunosuppression. Tumor-associated macrophages (TAMs) also interact with cancer stem cells, promoting tumorigenesis and drug resistance. TAMs secrete cytokines, chemokines, and proteases that facilitate tumor progression. TAMs are influenced by the tumor microenvironment, which includes chemokines like IL-4, IL-13, TGF-β, and IL-10, leading to M2 polarization. TAMs contribute to tumor progression by promoting angiogenesis, lymphangiogenesis, tumor growth, metastasis, and immunosuppression. They also suppress immune responses by secreting IL-10, TGF-β, and arginase 1, which inhibit cytotoxic T cells and NK cells. TAMs can be targeted for therapy by modulating their polarization, such as converting M2 to M1 macrophages, or by inhibiting their recruitment and activity. Therapeutic strategies include anti-angiogenic drugs, anti-macrophage agents, and immunomodulatory approaches. TAMs also play a role in tumor metastasis by facilitating cell migration and promoting the expression of matrix metalloproteases. Understanding TAMs' role in tumor progression is crucial for developing effective therapies. Targeting TAMs may provide novel approaches for cancer treatment by altering the tumor microenvironment and enhancing immune responses.