FOP in an abbreviation for Fibrodysplasia Ossificans Progressiva ( fī'brō-dĭs-plā'zhə ŏ-sĭf'ĭ-kānz'  prō'grĭ-sī'və) previously known as Myosis Ossificans Progressiva. 

FOP is a rare and distressing medical condition where bone forms in muscles and other soft tissues of the body.

Whenever extra bone is formed across the joints it restricts movement. It is a progressive disease and there is no cure. It does not effect a persons intelligence. 

FOP affects 1 in 2 million people worldwide. It has no ethnic or religious pattern. 

There has been 700 confirmed cases across the globe from an estimated 2500. 

There are 285 known cases in the United States.