Help me out here: what is achondroplasia?

Dwarfism:: Most people with short-limb dwarfism have achondroplasia. Bones grow mostly by making a plate of cartilage near the joint; people with achondroplasia cannot make cartilage, and their long bones grow very slowly.

Little people Dx: Achondroplasia is a condition of irregular cartilage formation(leading to slow or minimal long bone growth) caused by a gene mutation (new or inherited).This results in short limbs and vertebrae, relatively large head, slow muscle control but normal intelligence.Adults averge 48-50 inch height, patients have specific health issues.