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Histologic Diagnosis of Inflammatory Skin Diseases

Ground Substance

Ground substance (extrafibrillar matrix) is finely granular extracellular material that enmeshes fibrillar and cellular components of the body, including those of the dermis, binds water, and provides hydration to the skin. The ground substance of n…

Therapeutic Strategies in Dermatology

Stings: Key Points

…era members have distinct stinging patterns. Most nest in the ground or in walls and sting only if provoked, with the exception of Africanized bees. Honeybees typically leave a barbed ovipositor (stinger) in the skin, whereas bumble bees, wasps, and…

Therapeutic Strategies in Dermatology

Photosensitivity Dermatoses: Overview

…Photosensitivity dermatoses are caused either by an exogenous substance (either topical or systemic), or are idiopathic. These conditions initially present on sun-exposed skin, may be triggered by topical or systemic exposures, and tend to resolve wh…

A Clinical Atlas of 101 Common Skin Diseases

Nevus Sebaceus

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

A Clinical Atlas of 101 Common Skin Diseases

Phototoxic Dermatitis

…atory process that represents the combined effects of a toxic substance applied topically or administered systemically in combination with the effects of ultraviolet light, the result being a caricature of sunburn. The lesions consist of erythema and…

A Clinical Atlas of 101 Common Skin Diseases

Melanoma

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

A Clinical Atlas of 101 Common Skin Diseases

Cysts and Cystic Hamartomas

Papules, nodules, and tumors that, on gross examination, are usually skin colored and, on histopathologic examination, consist of an epithelium-lined sac that contains fluid, cells, or both in the case of true cysts and of cysts that are associated…

A Clinical Atlas of 101 Common Skin Diseases

Preface

…las of dermatology that is a work of art as well as a work of substance. 2. ┬áNearly all contemporary atlases devoted to dermatology have portrayed particular skin diseases in but very few images, often only a single photograph or two or three at most…

A Clinical Atlas of 101 Common Skin Diseases

Tinea Versicolor

An inflammatory disease caused by the fungus Malassezia furfur, the organisms of which proliferate in a slightly thickened stratum corneum. It manifests clinically as white or light brown macules that may be discrete or confluent, on the trunk espec…

A Clinical Atlas of 101 Common Skin Diseases

Dermatofibrosarcoma Protuberans

A malignant nonepithelial neoplasm (a sarcoma) presumably of perineural fibrocytes that presents itself usually on the trunk, but sometimes elsewhere, such as the extremities, face, and scalp. A papule of it tends to become a plaque, a nodule, a tum…

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