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Dermatology - Diseases & USMLE MCQs
5 clinical summaries in dermatology - each with pathophysiology, presentation, diagnosis, management, high-yield pearls, sample USMLE MCQs and an illustration from our medical library. Free to read, no login.
Atopic Dermatitis (Eczema)
Chronic pruritic inflammatory skin disease with impaired filaggrin skin barrier and Th2 inflammation; often part of atopic march (asthma, allergic rhinitis).
Reviewed 2 Jun 2026
Basal Cell Carcinoma
Basal cell carcinoma (BCC) is the most common human malignancy, arising from basal keratinocytes after cumulative UV damage. Slow-growing, locally destructive, and rarely metastatic.
Reviewed 24 May 2026
Cutaneous Squamous Cell Carcinoma
Second most common skin cancer arising from keratinocytes on sun-exposed skin; higher metastatic risk than BCC, especially on lip, ear and in immunosuppressed patients.
Reviewed 20 Jul 2026
Melanoma
Malignant tumour of melanocytes with high metastatic potential if diagnosed late; UV exposure, fair skin and BRAF/NRAS/KIT mutations drive risk. Early detection saves lives.
Reviewed 26 Jun 2026
Psoriasis
Chronic immune-mediated skin disease with well-demarcated erythematous plaques and silvery scale; IL-17/IL-23 axis driven, ~30% develop psoriatic arthritis.
Reviewed 2 May 2026
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