Fresh off my listening of the DaVinci Code

Brazilian doctors uncover 'Michelangelo code' - Yahoo! News
The doctors claim that there are hidden images of human anatomy all over the Sistine Chapel. They also claim that there are often clues within a section of the painting to indicate what is hidden (e.g. figures pointing at a body part, then that internal body part being depicted in a camouflaged way). Is it coincidence, or making up cloud images?