G-Type Young (Resident Evil 2)

Image of G-Type Young
This is the result of a host becoming infected with G-Embryo from the monster known as G. Unfortunately it is also the result of the G-Embryo being rejected by the host due to incompatibility with its DNA, which results in a very savage and gory escape from the body, usually resulting in the hosts body being split in two.

After a short period of time it grows into its full form known as G-Type Adult.