neither those two cases look like a Photo-shop by the look of it.
However just because I think this case is a fake I know it dose happen. Polycephally
http://en.wikipedia.org/wiki/File:Monstre-img_0573.jpg
There are two ways it happens First is a form of conjoined Twinning.
Or the other way is a mutation in the HOX (Homeobox) genes (Box genes are genes in early development that specify body compartmentalization) You can play around with them in flies and plants and make all number of funny looking ones.
View attachment 2286
Key for picture (Note plants are hermaphrodites so they possess male and female organs normally)
Se = Sepals (Leaf bud)
P = Petals (Modified brightly coloured leaf)
St = Stamens (Male Reproductive parts)
C = Carpels (Female reproductive parts)
A-B-C genes normally interact with each other
*A* expressed on it's own Makes Sepals
*A+B* At the same time makes the plan grow petals
*B+C* At the same time makes Male reproductive parts
*C* only makes Female reproductive parts.
I kinda think "Delta C" looks pretty as it's just an infinite amount of petals and buds growing inside itself
In this experiment they selectively deleted one or two of the genes.
With flies they've identified each of the HOX (Homeobox) genes
http://upload.wikimedia.org/wikipedia/commons/d/da/Hoxgenesoffruitfly.svg
Deletions or duplications of the Colour coded genes in this chart result results in the poor experimental fly requiring or loosing the coloured body part. I've seen flies with ANTp duplications before they have 4 wings and two torsos stacked ontop of one another.
DFD and SCR Duplications results in flies with multiple heads.
It dose happen of course happen sometimes naturally in humans. It's how you get people with 6 fingers and whatnot.