Bump on Knee
A 61-year-old woman presents with a 7-month history of a bump on the front of her left knee. What is your diagnosis?
Dermatology
Recurring Rash on Back
A 65-year-old man presents with a recurring rash on his back. What is your diagnosis?
Yellow Papules on Neck and Arms
A young woman presents with yellow papules on her neck and arms that started around puberty. What is your diagnosis?
Skin Thickening Around Fingers
A 47-year-old otherwise healthy woman presents with thickening of her skin over several months. Can you make the diagnosis?
Depigmented Macules and Patches on Lateral Back
A 15-year-old Black man presents with a 1-year history of light spots on his back that has grown slowly, with several new lesions appearing near the first one. What is your diagnosis?
Rash on Face, Trunk, and Extremities
A 60-year-old Black woman presents with a 30-day history of a nonitchy rash on her face, trunk, and extremities. What is your diagnosis?
Growing Patch on Side of Nose
A 64-year-old man with a history of numerous nonmelanoma skin cancers presents with a lesion on the left side of his nose that was first noticed about 6 months ago and is slowly growing. Can you make the diagnosis?
Inflammation and Redness of the Fingernail Folds
People who handle food may develop this skin condition due to food hypersensitivity reactions.
Bright Red, Dome-Shaped Papules
A 62-year-old man with gastric adenocarcinoma for which he has been receiving chemotherapy for 4 weeks presents to his internist with new lesions on his trunk.
Flat, Brown Macules on the Body
A 60-year-old man presents with brown macules on his face, arms, hands, and back.
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