Originally posted by flyingsparrow
if u look closly in fellowship u'll notice that he was scared from the cave trolls. Hence in rotk when he is laying shirtless he has two wounds one on each shoulder one from the morgul blade the other from the spear in moria.
At what point do they show Frodo with a scar from the cave troll.
The mithril shirt protected him if he had been wounded he wouldn't have said "I'm alright, I'm not hurt" would he, everything that happens after the cave troll stabs Frodo, leads us to believe that Frodo was uninjured by the troll.
Besides its fairly obvious which is the scar from the Wiki and the other is too fresh to be from the cave troll look at it, that is a very recent injury, not a scar.