A 48-year-old woman has a lower back pain and hypoesthesia in the left S1 dermatomal distribution (left calf and lateral left foot). What is the most likely cause?

Surgery

A 48-year-old woman has a lower back pain and hypoesthesia in the left S1 dermatomal distribution (left calf and lateral left foot). What is the most likely cause?

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?