Final answer:
A nephrostolithotomy involves removing a kidney stone through an existing opening.
Step-by-step explanation:
In a nephrostolithotomy, a stone may be removed from the kidney through an existing opening. This procedure is typically performed to treat large kidney stones or when other methods have failed to remove the stone. During the surgery, a small incision is made in the back and a tube is inserted into the kidney to access and remove the stone. This procedure can be done using minimally invasive techniques, such as laparoscopy, or through an open surgical approach.
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