M85.0 - Fibrous dysplasia (monostotic)
M85.03 - Fibrous dysplasia (monostotic), forearm
M85.031 - Fibrous dysplasia (monostotic), right forearm
M85.032 - Fibrous dysplasia (monostotic), left forearm
M85.039 - Fibrous dysplasia (monostotic), unspecified forearm