Missing body parts

Missing body parts, amputated limbs, and missing organs were frequently discussed or shown in Lost.

Occurrences

The following list shows when characters have mentioned, or were shown with missing body parts.

Season 1

Kate was turned in by Ray Mullen who has a prosthetic arm. ("Tabula Rasa")
Locke referred to Norman Croucher, a double amputee who climbed Everest, while telling Randy about his planned walkabout trip to Australia. ("Walkabout")
Christian's whole body was missing from his coffin in the caves. ("White Rabbit")
Sayid threatens to cut off suspected bomber's hands during interrogation flashback. ("Confidence Man")
Hurley, after stepping on a sea urchin, urged Jin to pee on his foot to stop the poison, he said, "Do you understand infection, gangrene, amputation?" ("Hearts and Minds")
Jack threatened Sawyer for the case by saying he wouldn't give him his pills which would make Sawyer want his arm to be removed.
Sayid threatened to cut out Sawyer's eye. ("Confidence Man")
Hibbs had a segment of his fourth digit on his left hand missing. ("Outlaws")
Martha Toomey told Hurley that she lost her leg in a car crash. ("Numbers")
Locke sacrificed his kidney to save his father. ("Deus Ex Machina")
Jack planned to amputate Boone's leg to save his life. ("Do No Harm")
Rousseau referred to Montand losing his arm in the Dark Territory. ("Exodus, Part 1")

Season 2

When the survivors watched the Swan Orientation Film, the presenter, Dr. Marvin Candle, had a prosthetic arm. When seen in another Orientation Film, both of his arms were functional. ("Orientation")
Sawyer told Jin, "Yeah, yeah, Chewie, I know. My arm's about to fall off." ("Abandoned")
A glass eye was discovered in the Arrow station. ("The Other 48 Days")
Ana Lucia told Goodwin she planned to cut off Nathan's finger to make him talk. ("The Other 48 Days")
Sayid found a statue of a foot and lower leg. ("Live Together, Die Alone, Part 1")

Season 3

Juliet told Jack that the station they are in is called the Hydra, a reference to a mythological creature able to regrow heads that had been cut off. ("A Tale of Two Cities")
Mikhail Bakunin was missing an eye. ("The Cost of Living")
Jack removed a tumor from Ben's spine. ("I Do")
Roger's corpse was accidentally decapitated when removed from the van by Hurley and Jin. Previous to this, Vincent stole his arm. ("Tricia Tanaka Is Dead")
Jin's ghost story was about a man with an amputated hand. ("Catch-22")

Season 4

While hiking through the jungle, Locke told Sawyer about his missing kidney, and how, ironically, it saved his life after being shot by Ben. ("Confirmed Dead")
Jack had his appendix removed. ("Something Nice Back Home")

Season 5

Jones' men threatened to cut off Juliet's hands. ("The Lie")
Montand's arm was pulled off while the science team tried to rescue him from the Monster. ("This Place Is Death")

Season 6

Montand's skeleton in the Temple ruins was missing an arm. ("LA X, Part 1")

The Lost Experience

There was a "Missing Organs Folder" which was repeatedly referenced, and an organ harvesting scandal which was at the heart of the story. (The Lost Experience)

Producers' commentary

From the 11/28/05 podcast:

“

Carlton Cuse: Exactly. Is there any connection between the loss of Montand's arm, and the fact that Dr. Marvin Candle has a fake hand?

Damon Lindelof: Eh, I dunno, is there? We also found a glass eye in the Arrow Station. People just lose body parts I think easily on the Island.

Carlton Cuse: Exactly.

Damon Lindelof: It isn't a widely known fact that actually Marvin Candle has a fake hand. You actually have to watch the film a fair amount of times, so I think that's a good nugget of podcast exclusivity that you just downloaded there.

Carlton Cuse: Wow, that's cool. And would it be possible that in a future episode we would discover why Marvin Candle has a fake hand?

Damon Lindelof: I suppose anything's possible, I guess. But, unlikely. [Carlton laughs]

”