A Curious Case of Knee Pain

Synovial chondromatosis
A 46-year-old woman with a history of rheumatoid arthritis presents with worsening knee pain and walking difficulty. Discover the unusual diagnosis.
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The Case of the ‘Rice Body’ Wrist

Mycobacterial tenosynovitis due to Mycobacterium avium complex
A 51-year-old man with diabetes and HIV presents with chronic wrist swelling, pain, and numbness. MRI reveals 'rice bodies,' leading to a rare diagnosis.
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A Biker’s Painful Pelvic Injury

Open-book fracture
A 45-year-old man presents with severe pelvic pain after a motorcycle accident. Discover the diagnosis behind a widened pubic symphysis.
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The Mystery of a Child’s Limp

Legg–Calvé–Perthes disease
A 4-year-old boy presents with hip pain and a limp, but no trauma or fever. Explore the diagnostic process for this common pediatric orthopedic issue.
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Teen Hip Pain: More Than a Sprain

Slipped capital femoral epiphysis
A 12-year-old with obesity develops a limp and right hip pain. Discover the most likely diagnosis for this common adolescent hip disorder.
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When a Fracture Tells a Deeper Story

Assault
Explore a case of an isolated ulnar shaft fracture, or 'nightstick fracture.' Learn why this specific injury should raise concern for a serious underlying cause.
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When Kidneys Weaken the Knees

Quadriceps tendon ruptures
A 38-year-old man with end-stage renal disease presents with progressive difficulty walking after a minor injury. What's the underlying orthopedic issue?
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Gas in the Lumbar Spine?

Emphysematous osteomyelitis
A 62-year-old man presents with low back pain and lethargy. Imaging reveals a surprising finding of gas within the lumbar spine. What's the diagnosis?
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