In some old fractures, cailaginous tissue forms over the fractured bone ends with a cavity in between containing clear fluid. What is this condition called?

Surgery

In some old fractures, cailaginous tissue forms over the fractured bone ends with a cavity in between containing clear fluid. What is this condition called?

A tender swelling in submandibular triangle is mostly likely diagnosed as

In transfacial proportions, the face Is divided into how many segments:

Specific for Ankylosing spondylitis is true?