Lymphadenectomy is a surgical procedure in which lymph nodes are removed for diagnostic or therapeutic purposes. This procedure is commonly performed in cancer patients to determine the spread of cancer to nearby lymph nodes or to remove cancerous lymph nodes. Lymphadenectomy can help doctors determine the stage of cancer and develop a treatment plan. The procedure can also be performed to treat certain types of lymphatic system disorders. Overall, lymphadenectomy plays a critical role in the diagnosis and treatment of various medical conditions.