X-ray appearance of sequestrum is -
Ans. is 'a' i.e., Unnatural radiodense fragments Sequestrum* Sequestrum is a piece of dead bone, surrounded by infected granulation tissue trying to eat the sequestrum away.* The sequestrum is hardl, rough, porus, light in weight and lighter in colour than normal Normal pattern of bone is lost. (Note : Sequestrum in syphilis and TB is heavier than normal bone because sclerosis usually precedes the death of the bone).* On x-ray, sequestra show up as unnatural dense fragments, in contrast to the surrounding osteopenic bone.
Unnatural radiodense fragments
Osteopenic fragment
Fragment with honeycomb loculated appearance
Radiolucent area with speckled calcification
Infection of Bones & Joints