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A Clinical Atlas of 101 Common Skin Diseases

Dermatofibroma

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An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous inflammation, and fibrosis.

A Clinical Atlas of 101 Common Skin Diseases

Dermatofibrosarcoma Protuberans

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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 Clinical Atlas of 101 Common Skin Diseases

Neurofibromatosis

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A constellation of lesions that represent disorders of melanocytes (e.g., axillary "freckles" and café au lait "spots") and of proliferations of Schwann cells (e.g., papules, nodules, and tumors of neurofibroma).

A Clinical Atlas of 101 Common Skin Diseases

Pruritic Urticarial Papules and Plaques of Pregnancy

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An inflammatory process in pregnant women near term that consists of urticarial papules and plaques, especially on the trunk and particularly in association with lesions of striae atrophicantes, the lesions disappearing shortly after parturition.

A Clinical Atlas of 101 Common Skin Diseases

Squamous-Cell Carcinoma

…osis and radiation keratosis, are euphemisms for various types of superficial squamous-cell carcinoma. Very episodically, neoplastic cells of those types of squamous-cell carcinoma proliferate wildly, and the primary neoplasm then consists of aggrega…

A Clinical Atlas of 101 Common Skin Diseases

Sclerodermas

…different inflammatory diseases that have in common hardening of the skin by virtue of thickening of bundles of collagen in the dermis and subcutis. One of those diseases manifests itself as localized or widespread patches and plaques (morphea) and…

A Clinical Atlas of 101 Common Skin Diseases

Xanthomas, Including Xanthogranulomas

Deposits of lipid in the skin and sometimes in subcutaneous tissues as a consequence often, but not always, of hyperlipidemia. The lipid deposits are expressed as yellowish papules and plaques, and nodules and tumors….

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eruptive Vellus Hair Cyst?

…cond, the lesion is not a cyst, but a hamartoma, one component of which is cystic. Third, the cystic element contains not only vellus hairs, but also corneocytes and abundant lipid. Last, eruptive vellus hair cyst is a variant of steatocystoma. Steat…

Dermatology Practical & Conceptual

A keratoacanthoma with venous invasion

…aviour, such as perineural invasion. Herein we report the case of a keratoacanthoma with venous invasion proven by immunoperoxidase and elastic tissue stains. Introduction Different forms of squamous cell carcinoma (SCC) exist, keratoacanthoma (KA) v…

Differential Diagnosis in Dermatopathology

Keratoacanthomatous verruca vulgaris vs. Verrucous keratoacanthoma

Deposits of lipid in the skin and sometimes in subcutaneous tissues as a consequence often, but not always, of hyperlipidemia. The lipid deposits are expressed as yellowish papules and plaques, and nodules and tumors….

Differential Diagnosis in Dermatopathology

Granuloma annulare vs. Eruptive xanthoma

Deposits of lipid in the skin and sometimes in subcutaneous tissues as a consequence often, but not always, of hyperlipidemia. The lipid deposits are expressed as yellowish papules and plaques, and nodules and tumors….

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