Derm Dx: Scaly Lesion on the Calf
A woman presents with a lesion on her calf that has been increasing in size over the past several months.
Dermatology Information Center
Derm Dx
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Sunscreen Use: Recommendations vs Real World
Deficits in use of sunscreen indicate that people pay little attention to the recommendations of health authorities, regardless of their skin type, and underscore an urgent need for targeted public information on its use.
Derm Dx: Dark Streak Traversing the Thumb Nail
A streak of dark pigmentation in a woman’s thumb nail is an incidental finding during a leg examination.
Derm Dx: Concerning Growth on the Scrotum
A patient is referred for evaluation of an asymptomatic, deeply pigmented plaque on his scrotum.
Derm Dx: Firm Nodule on the Nose
A woman presents with a firm nodule on her nose.
Melanoma Risk Not Significantly Increased With Premenopausal Progestogen Use
A strong influence of progestogens used before menopause on melanoma risk was not supported by novel study results, nor do they support a phototoxic effect of progestogens in melanoma risk.
Erythematous Facial Rash
A teenaged girl is brought to the clinic by her mother for evaluation of a rash on her face and back.
Circumscribed Hyperpigmented Lesions
A 10-year-old child presents for evaluation of a 5-day history of lesions on the hands. Examination reveals multiple circumscribed, hyperpigmented lesions. The lesions appeared 12 hours after the patient took oral ibuprofen for fever. Three months earlier, identical lesions appeared in the same locations after the patient took the same medication for 3 days. This…
Annular Erythematous Plaque
A 29-year-old white man presents with a 10-day history of a scaly, pruritic lesion on his right posterior thigh. His medical and family histories are unremarkable. On examination, the lesion is an annular erythematous plaque with trailing scale. The polycyclic plaque has a central clearing. Biopsy is performed, the results of which show a dense…
Derm Dx: Cysts on the Trunk and Buttocks
A patient presents with numerous white cysts on his trunk and buttocks.
Derm Dx: Plaque on the Interior Thigh
A woman has a lesion on her leg that has increased in size.
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