9 Most Bizarre Medical Conditions You’ve Never Seen

2. Polyostotic Fibrous Dysplasia

An isolated case of fibrous dysplasia that affects more than one bone with the substitution of fibrous tissue, the very reason which causes physical deformity and fractures. This rare medical condition can appear in any part of the human skeletal system but may commonly appear in the skull, ribs, upper arms, pelvis, thighs and shin.