Heel Ulcer Puzzle: Which Test to Skip?
A patient has a non-healing heel ulcer for 2 years. Learn the key differential diagnoses and why one common diagnostic test is often the least useful choice.
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A Rash More Than Skin Deep
Explore pruritic, psoriasiform skin changes on the hands and feet. Learn about acrokeratosis paraneoplastica and its link to serious internal disease.
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The Itchy, Wandering Rash
A patient presents with a migratory, intensely itchy skin eruption on their foot. Discover the diagnosis behind these classic serpentine lesions.
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A Red Face & Blurry Vision
A man presents with recurrent facial flushing, a foreign-body sensation in his eyes, and blurry vision. Discover the common diagnosis that links these symptoms.
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A Baffling Black Eschar
A patient presents with a fever, rash, and a developing black eschar. Explore the differential diagnosis of this classic lesion and identify the outlier.
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What’s This Map on My Tongue?
A man presents with a 3-month history of migratory red patches on his tongue. Explore the differential diagnosis and uncover the most likely benign condition.
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A Curious Case of a Fading Rash
Explore a medical case of a woman with a chronic, remitting depigmenting rash. Learn about the diagnostic clues, including classic microscopic findings.
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A Puzzling Case of Darkening Skin
Explore a case of a patient with generalized weakness and progressive, widespread skin discoloration. What is the rare, underlying diagnosis? Learn more.
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Painless Sore, Puzzling Rash
A patient presents with a painless oral ulcer and skin lesions on the feet. Uncover the stages and diagnosis of this classic systemic infection.
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Painless Growths in the Mouth
A patient with HIV presents with painless warty lesions in the mouth. Explore the differential diagnosis and identify the most likely viral cause.
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