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Arsenic is a potent chemotherapeutic drug thatis applied as a treatment for cancer; it exerts its functionsthrough multiple pathways, including angiogenesis inhibition. As angiogenesis is a critical component of the progressionof many diseases, arsenic is a feasible treatmentoption for patients with other angiogenic diseases, includingrheumatoid arthritis and psoriasis, among others. However,arsenic is also a well-known carcinogen, demonstrating apro-angiogenesis effect. This review will focus on the dualeffects of arsenic on neovascularization and the relevantmechanisms underlying these effects, aiming to provide arational understanding of arsenic treatment. In particular, weexpect to provide a comprehensive overview of the currentknowledge of the mechanisms by which arsenic influencesangiogenesis.