<prompt> Which can cause loose body in the joint -RAAnkylosing spondylitisOASLE  <response>: Ans. is c i.e., OA o Causes of loose bodies includei Osteoarthritisiii Osteochondral fracture injury v Synovial chondromatosisii Osteochondritis dessicansiv Charcots disease o Among these, osteochondral fracture causes single loose bodies, while all other can cause multiple loose bodies, maximum by synovial chondromatosis up to hundrades. 