When Moll and Wright first described the spondyloarthritides in the early 1970s, the archetype of the group was ankylosing spondylitis (AS).1 The shared clinical features of the spondyloarthritides were sacroiliitis; asymmetric large joint peripheral arthritis; psoriasis or psoriaform skin lesions, including keratoderma blennorrhagica; uveitis; and bowel inflammation. Moll and Wright described five clinical subgroups of…
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