Photosensitivity and Photoreactions

Mar 11, 2019 by in Dermatology Comments Off on Photosensitivity and Photoreactions

Sunlight emits a wide spectrum of radiation energy, extending from radio waves through infrared, visible, and ultraviolet (UV) light, to X-rays. The wavelength range of visible light is 400 to…

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Inborn Errors of Metabolism

Mar 11, 2019 by in Dermatology Comments Off on Inborn Errors of Metabolism

The inborn disorders of metabolism are a group of primarily autosomal recessive hereditary disorders that result in metabolic and clinical defects. (More comprehensive discussion of some of these topics is…

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Cutaneous Tumors and Tumor Syndromes

Mar 11, 2019 by in Dermatology Comments Off on Cutaneous Tumors and Tumor Syndromes

Because of the increasing public awareness and incidence of skin cancer, physicians are often consulted regarding tumors of the skin. In children, the vast majority of cutaneous tumors are benign,…

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Exanthematous Diseases of Childhood

Mar 11, 2019 by in Dermatology Comments Off on Exanthematous Diseases of Childhood

Several viral and bacterial illnesses may be accompanied by localized or generalized skin eruptions called exanthems . These eruptions may be the first manifestation of a disorder and often are…

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Viral Diseases of the Skin

Mar 11, 2019 by in Dermatology Comments Off on Viral Diseases of the Skin

Viruses are ultramicroscopic organisms that grow only within living cells. The antigenic material responsible for viral immunologic reactions is present in the outer protein membrane (capsid) of the virus. The…

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Disorders of Hair and Nails

Mar 11, 2019 by in Dermatology Comments Off on Disorders of Hair and Nails

Hair Hair is a protein by-product of follicles distributed everywhere on the body surface except the palms, soles, vermilion portion of the lips, glans penis, penile shaft, nailbeds, and sides…

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Bullous Disorders of Childhood

Mar 11, 2019 by in Dermatology Comments Off on Bullous Disorders of Childhood

Blisters or bullae are rounded or irregularly shaped lesions of the skin or mucous membranes that result from the accumulation of fluid between the cells of the epidermis, the epidermis…

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Hereditary Disorders of Cornification

Mar 11, 2019 by in Dermatology Comments Off on Hereditary Disorders of Cornification

The hereditary disorders of cornification, or the ichthyoses, are characterized by impairment in desquamation with hyperkeratosis and/or scaling. The ichthyoses are largely distinguished by their clinical and in some cases,…

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