What’s This on the Knee X-ray?
Explore a classic knee radiograph showing linear calcification in the articular cartilage. Learn about this key finding and its link to pseudogout.
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Lupus Pernio: What’s the Key Lab?
A patient presents with lupus pernio, a classic skin sign of sarcoidosis. Explore the most specific laboratory test used to support the diagnosis.
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Clues at Your Fingertips
Discover how nailfold changes like dilated vessels and telangiectases can be crucial signs for diagnosing systemic autoimmune diseases. Learn more.
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A Painful Calf in Rheumatoid Arthritis
A patient with rheumatoid arthritis presents with a painful calf. Explore the differential diagnosis and key features of this common joint-related complication.
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Painful Calf: A Diagnostic Puzzle
A patient with rheumatoid arthritis presents with a painful calf. Explore the differential diagnosis for lower leg pain and uncover the real cause.
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A Case of Needle-Shaped Crystals
A patient presents with elevated serum uric acid. Skin scrapings reveal bright-yellow needle-shaped crystals. What is the underlying diagnosis?
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Not Just Your Big Toe
A patient presents with a swollen right first distal interphalangeal joint. Analysis of expressed yellow-white material reveals a definitive diagnosis.
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Bleeding Gums: More Than Just Gingivitis?
A patient presents with bleeding gums. Examination reveals unusual bushy loop formations in the gingiva. What underlying systemic condition could this indicate?
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A Fiery Hand Mystery
A patient experiences severe right hand pain, redness, and swelling triggered by movement, bathing, and exercise. Explore the differential diagnosis.
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A Child’s Rash: More Than Skin Deep
A 10-year-old presents with classic Gottron's papules and facial erythema. Discover the key lab test that confirms a diagnosis of juvenile dermatomyositis.
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