Strange Medical Conditions You Won’t Believe Are Real

Fibrodysplasia Ossificans Progressiva: Stone Man Syndrome

Fibrodysplasia ossificans progressiva (FOP) - more commonly known as stone man syndrome - is a genetic disorder that turns tissue, tendons, ligaments, and cartilage into bone over time. FOP is quite rare, affecting approximately one to two million patients worldwide. The condition commonly becomes noticeable in childhood, beginning in the neck and shoulders and working its way down the body and into the limbs. As FOP progresses, patients lose mobility. In some cases, they are unable to fully open their mouth and have a difficult time speaking and eating. Any trauma to muscles and joints such as a hit or a fall can trigger muscle swelling and inflammation that often leads to more ossification to the area. Often children born with FOP have larger, malformed toes, shorter thumbs, and other skeletal deviations.

Now that you know about fibrodysplasia ossificans progressiva, keep reading to learn about hypertrichosis, the werewolf syndrome.