Which of the following is NOT associated with ankylosing spondylitis:: (A) SLE, (B) Reiter's syndrome, (C) Psoriatic ahropathy, (D) Crohn's disease
Answer is A. Ankylosing spondylitis is an inflammatory disorder of unknown cause Primarily affects the axial skeleton; peripheral joints and extraaicular structuresOlder names: Marie-Strumpell disease or Bechterew's diseaseTypically associated with HLA-B27(ref:Harrison's 18/e p2774, 2775)