Q: Is there a hereditary kind of back arthritis?A: Axial spondyloarthritis (AS) is a condition strongly associated with inheriting the HLA-B27 gene (over 5% of people with this gene develop the condition), although not all patients diagnosed with this condition have this gene. There are two subtypes of AS; ankylosing spondylitis, which shows sacroiliac inflammatory changes on X-ray (or other imaging), and non-radiographic AS which is similar to ankylosing spondylitis but without the [...]