A 19 year young patient with sclerotic lesion at diaphysis. What is the MOST likely diagnosis?

Surgery

A 19 year young patient with sclerotic lesion at diaphysis. What is the MOST likely diagnosis?

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?