I haven't read all the hypothesis, but the tumors are simply a way of explaining the audience the decay on Vinnie Jones' body, and the fact that he's starting to lose steam. Or you could think that it is caused by the contact with the "others".
Thread profile page for "does anyone really know the reason for the tumors on his chest?" on http://imdb.com/title/tt0805570/.
This report page is a snippet summary view from a single thread "does anyone really know the reason for the tumors on his chest?", located on the Message Board at http://imdb.com/title/tt0805570/.
This thread profile page shows the thread statistics for: Total Authors, Total Thread Posts, and Thread Activity
| |||||||||||||||||||||||