3 scouts, a tin can, knife, spoon, monkey wrench, tweezers, other items that you might want to ad-lib.
a table is helpful, a sheet is a good addition

One scout is the patient laying on a table or on the floor. Drape the sheet over him as if he is ready for an operation. He needs to have the tin can hidden at his side away from the audience.

One scout, the Doctor, walks in with his hands held up as if he's just scrubbed for surgery. The other carries in all the tools. They lean over the patient.

Doctor: Is this the patient, sir?
Nurse: Yes, sir.
Doctor: Hmmmmmm, looks pretty bad.
Nurse: Can you save him, sir?
Doctor: Well, sir, I don't know. It'll be tough.
Nurse: What does he have, sir?
Doctor: It looks like a terrible cancer there, but I think we can do it. Knife!
Nurse: Knife, sir.
Doctor: Spoon!
Nurse: Spoon, sir.
Doctor: Oops, that's the liver.
Nurse: There's the bowels, sir. Pee-uuu!
Doctor: Yes, sir. Those sure smell. Aha, I've found the cancer. Monkey wrench!
Nurse: Monkey wrench, sir.
Doctor: Tweezers!
Nurse: Tweezers, sir.
Doctor: There, I've removed the cancer.
Nurse: Congratulations, sir. But, what should I do with the can, sir? (while holding up a tin can)