A Clinical Atlas of 101 Common Skin Diseases

Squamous-Cell Carcinoma

A malignant neoplasm of keratinocytes that when present as a keratotic macule or papule on skin damaged badly by sunlight is referred to as solar keratosis. When present as a plaque it is termed Bowen’s disease, and when present as many papule…

A Clinical Atlas of 101 Common Skin Diseases

Sclerodermas

A generic term for at least two 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 pa…

Dermatology Practical & Conceptual

A keratoacanthoma with venous invasion

…r, 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) variou…

Differential Diagnosis in Dermatopathology

Keratoacanthomatous verruca vulgaris vs. Verrucous keratoacanthoma

A generic term for at least two 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 pa…

A Clinical Atlas of 101 Common Skin Diseases

Lymphomatoid Papulosis

A distinctive type of CD 30 lymphoma characterized by the presence mostly of papules, some of them purpuric, that may ulcerate and heal with a scar, and by lesions that tend to come and go for years, eventually disappearing entirely or, on occasion,…

A Clinical Atlas of 101 Common Skin Diseases

Molluscum Contagiosum

A hyperplasia of infundibular epithelium consequent to the effects of infection by a pox virus and manifesting itself clinically as one or more skin-colored, smooth-surfaced, dome-shaped papules, each with a central umbilication filled with horny ma…

A Clinical Atlas of 101 Common Skin Diseases

Verrucae

Papules on skin and mucous membranes that result from infection of keratinocytes by different types of papillomavirus and classified according to their silhouettes, to wit, papillated (verrucae vulgares on different sites such as volar skin, i.e., v…

Differential Diagnosis in Dermatopathology

Discussions

…arly true of the expression of verruca vulgaris that resembles keratoacanthoma closely and of the manifestation of keratoacanthoma that mimics verruca vulgaris. The two conditions have in common a digitate silhouette, parakeratosis accompanied often…