Reiter's syndrome

1. What is the triad seen in Reiter's syndrome?
2. What infections are associated with Reiter's syndrome? What % progress to AS?
*3. What are the joint-associated manifestations of Reiter's syndrome?
4. What are other manifestations of Reiter's?
*5. What are the radiographic findings of Reiter's syndrome?

Answers:
1. Conjunctivitis, arthritis, nongonococcal urethritis.
2. Chlamydia, campylobacter, yersinia, shigella, salmonella, HIV. 3-10% progress to AS.
3. Asymmetric arthritis starting 2-4 weeks after infection, avg of 4 joints affected (distal LE>UE), sausage digits, enthesopathies, sacroiliitis.
4. Ocular, urethritis, balanitis circinata (painless ulcers on penis), keratoderma blennorrhagia, Reiter's nails, cardiac conduction defects, weight loss, fever, amyloidosis.
5. Lover's heel (erosion and periosteal changes at insertion of plantar fascia and Achilles), asymmetric SI joint involvement, syndesmophytes, pencil in cup deformities.