Septic arthritis or Pott disease? Ankylosing spondylitis, degenerative arthritis, or neither? The most common sites for spinal epidural abscess? Test yourself in an 8-part quiz.

Lofgren syndrome

The patient is plagued by problems: Severe headaches, nausea, vomiting, a rash, chest and abdominal pains, and by the time she reaches a rheumatologist, periorbital edema and photophobia. Can you guess the cause?

The man, who is on dialysis, presented with pain in numerous joints at once. The images don't show signs of arthritis. Can you guess the diagnosis from descriptions of the findings?

pigmented villonodular synovitis

For a woman of her age and medical history with a weight problem, early osteoarthritis might not be an unreasonable diagnosis for knee pain and swelling after treadmill walking. But in rheumatology, things are so often not what they seem at first glance. What is your diagnosis?

"foamy" glomerus in Fabry disease

A kidney biopsy is ordered after a 36-year-old woman initially diagnosed with isolated Raynaud phenomenon reports a series of new symptoms: arthralgia, facial paresthesia, then a photosenstive rash. The problem may not match your first guess.

You’re watching this teenager closely for further developments. Since the 17-year-old moved to the northeast from the Caribbean, her fingers are cold and white sometimes in winter. Simple, you say? The plot thickens.

Radiologists noticed an asymptomatic mass in the right hip of a patient who had presented with left hip pain. She denied any trauma. What's going on?


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