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…

A Clinical Atlas of 101 Common Skin Diseases

Syphilis

An inflammatory process, caused by the spirochete Treponema pallidum, that tends to evolve through three stages, namely, primary (typified usually by a solitary chancre), secondary (characterized by widespread macules and papules on skin and mucous…

Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…ingertips and nail beds, and then elsewhere on what is called glabrous skin, glabrous referring to skin that is smooth and which sports vellus hairs, but not terminal ones. Early in embryogenesis, the interface between epidermis and dermis is flat. D…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Perivascular Dermatitis

…vesiculation, a situation that presents itself most often on glabrous skin in polymorphous light eruption (for perivascular mostly) (Fig. 5.42 A&B) and in a response to the “bite” of an insect (for perivascular and interstitial) (Fig…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dandruff a Disease?

…cause the scale desquamated normally falls freely from “glabrous” skin. In sum, dandruff is a process physiologic, in contrast to seborrheic dermatitis, which is pathologic. No relationship whatever exists between dandruff and seborrheic…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen planus

…ch, unlike the circumstance conventional of a few vesicles on glabrous skin, can be debilitating. An analogy exists in the realm of psoriasis, namely, between pustular psoriasis on palms and soles (the Barber type) and explosive widespread pustular p…

Differential Diagnosis in Dermatopathology

Discussions

…nits are performed relatively uncommonly compared to those of glabrous skin and the biopsy specimens obtained are unsatisfactory so often. Biopsy specimens of the scalp and of nail units tend to be superficial and often are compromised further by art…

Dermatology Practical & Conceptual

Introduction to the method

…r thick Lines branched can be thin or thick Lines parallel on glabrous skin can follow furrows or ridges, or they can cross furrows and ridges Lines radial can be thin or thick. Lines radial may be present at the periphery of the lesion (peripheral)…