Polyostotic fibrous dysplasia

Nature

Polyostotic fibrous dysplasia is a form of fibrous dysplasia affecting more than one bone. Fibrous dysplasia is a disorder where bone is replaced by fibrous tissue, leading to weak bones, uneven growth, and deformity.

McCune-Albright syndrome includes polyostotic fibrous dysplasia as part of its presentation. When polyostotic fibrous dysplasia manifests in the long bones, limping results; when it manifests in the face, asymmetric growth of the face can result.

One treatment that has been used is bisphosphonates.

Source: Wikipedia

Type 
(G) Very specific problems