+A **tumor suppressor** is a critical [gene](/wiki/gene) that regulates cell division and prevents the uncontrolled growth leading to cancer. These molecular guardians act as the cell's "brakes," initiating [apoptosis](/wiki/apoptosis) or halting the cell cycle if errors occur. When a tumor suppressor gene is mutated or lost, the risk of malignancy significantly increases.
+## See also
+- [Oncogene](/wiki/oncogene)
+- [Cell Cycle](/wiki/cell_cycle)
+- [Mutation](/wiki/mutation)
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