<prompt> All of the following are the causes of sudden increase in pain in osteochondroma, except -Sarcomatous changeFractureBursitisDegenerative changes  <response>: Osteochondroma usually presents as a painless swelling.The occurrence of pain suggests some complications such as :Bursitis at the tip of the swelling.Fracture through the stalk of the osteochondromaImpingement on or tethering of neighbouring structures such as a tendon, muscle or nerve.Malignant transformation 