What is the surgical procedure for the removal of the spleen called?

The surgical procedure for the removal of the spleen is known as a splenectomy. This term is derived from "splen," which refers to the spleen, and "ectomy," which signifies surgical removal. The spleen plays several important roles in the immune system and in filtering blood; therefore, a splenectomy may be performed for various medical reasons, such as trauma, cancer, or blood disorders.

The other terms listed refer to different surgical procedures: cholecystectomy involves the removal of the gallbladder, hepatectomy refers to the removal of the liver (or a portion of it), and appendectomy is the removal of the appendix. Each of these procedures is specific to a different organ and their respective conditions, making splenectomy the correct choice for the removal of the spleen.