Sclerosteosis

Sclerosteosis is a fictional condition in the YanderX Series, and based of a real life condition of the same name.

Versions
There are two forms of Sclerosteosis, Sclerosteosis-A and Sclerosteosis-B

All Known Effects
All forms of Sclerosteosis have the same effect, although with different side-effects. People suffering with Sclerosteosis have increased bone density, increasing strength and toughness of the bones.

Side Effects
Sclerosteosis-A is the rarest (and the fictional) form of the condition. There is only a 0.1% chance of a person being born with it. Sclerosteosis-A has no side effects, and is considered more of a mutation than an actual disease among scientists studying it.

Sclerosteosis-B is the severe (and the real-world) form of the disorder. People with Sclerosteosis-B are often tall and have webbed or fused fingers (syndactyly), most often involving the second and third fingers. The syndactyly is present from birth, while the skeletal features typically appear in early childhood. People with Sclerosteosis-B may also have absent or malformed nails. Sufferers often do not survive for very long, as the increased bone density causes head-aches, as the bones can put pressure on vital parts of the body, such as the brain.