Book excerpt: This color atlas is a practical pictorial guide to the diagnosis of skin and nail conditions of the lower extremities. It features more than 1,000 detail-revealing full-color clinical photographs of over 100 common and uncommon lesions, grouped into easy-to-follow categories. The succinct text accompanying each photograph explains the lesion's salient features and, whenever possible, provides a differential diagnosis. Therapeutic recommendations offered include new treatments for fungal nails and for scars. The opening chapter, on general principles, includes a classification with an algorithm and a problem-oriented algorithm. Subsequent chapters cover the entire gamut of disease entities--eczema; contact dermatitis; drug and toxic reactions; papulosquamous diseases; benign tumors; premalignant and malignant tumors; bacterial, viral, and fungal skin infections; infestations, parasites, and bites; developmental disorders; manifestations of internal disease; manifestations of circulatory disease; sweat and associated disorders; mechanical injuries; psychocutaneous disorders; nail disorders; and scar conditions.