Ankylosing spondylitis and sarcoidosis — Coincidence or association?

We report a 25-year-old woman presenting with sarcoidosis and
bilateral sacroiliitis. Her sarcoidosis related symptoms (malaise,
cough and dyspnoea) improved dramatically under treatment with
steroids but severe back pain persisted. Only seven similar cases
have been described over the last 40 years and the question of a
possible association between the two diseases has been raised.
However, prevalence data from the literature and the apparent lack
of genetic links are better arguments for coincidence than for
association.