Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Pseudopelade?

“In October, 1888, we presented a review of folliculitis and perifolliculitis decalvans at the Soci?t? m?dicale des h?pitaux, and, at this moment, we have nothing to add; there are three principal clinical types related in some way to one ano…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Perivascular Dermatitis

See Figs. 5.16 A&B, 5.17 A&B, 5.18 A&B, 5.19 A&B, 5.20 A&B, 5.21 A&B, and 5.22 A&B Figure 5.16 A. Perivascular dermatitis, perivascular only, superficial. B. Perivascular dermatitis, perivascular only, superficial and…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema nodosum

Erythema nodosum Synonyms Erythema contusiforme Erythema contusiformis Dermatitis contusiformis Erythema nouesux Presentation stereotypical Age and sex Young adults, especially women Distribution of lesions Bilateral and symmetrical over the pretibi…

Histologic Diagnosis of Inflammatory Skin Diseases

Livedo vasculitis

Livedo vasculitis Synonyms Livedoid vasculopathy Atrophie blanche Atrophie alba PURPLE (painful purpuric ulcers with reticular pattern of the lower extremities) Livedo reticularis with summer ulcerations Livedo with ulceration Milian’s white…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Vasculitis

See Fig. 5.218 A&B. Figure 5.218 Vasculitis. A. Small vessel. B. Large vessel. Before a reasoned and reasonable method for diagnosis histopathologic of vasculitis in skin and subcutaneous fat can be formulated, a definition of vasculitis must…

Histologic Diagnosis of Inflammatory Skin Diseases

Introduction

The understanding of diseases has been founded traditionally on the tripod of diagnosis (what is it?), etiology (what caused it?), and pathogenesis (how did it happen?). Current emphasis in medicine, however, is on the latter two legs of that stand,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Perforating Diseases?

“Perforating dermatoses: . . . various cutaneous disorders are discussed in which the process of perforation and elimination of various tissue components plays a major role in the basic pathologic mechanism. These include perforating granulom…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Perivasculitis?

“Pruritic urticarial papules and plaques of pregnancy (PUPPP) was recently defined as an intensely pruritic cutaneous eruption occurring in the third trimester. . . . The overall picture was nonspecific and ranged from one suggestive of eryt…