Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dandruff a Disease?

“Seborrheic dermatitis consists of a dry form (simple dandruff), with small dry to thick powdery scales . . .” White JW. Localized eczematous disease. In: Sams WM, Lynch PJ, eds. Principles and practice of dermatology. New York, NY: Ch…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…developed and later stages; no dell 2. Basket-woven pattern of the stratum corneum 2. Lamellate and compact pattern of the stratum corneum 3. Papillomatosis either absent or slight 3. Papillomatosis prominent in lesions developed fully 4. Seve…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Necrotizing Vasculitis?

…synonym for leukocytoclastic (allergic) vasculitis (and scors of equivalents for that particular type f vasculitis, among those being Henoch-Sch?nlein and Gougerot-Ruiter types, small-vessel expression of periarteritis nodosa, anaphylactoid purpura,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Palpable Purpura?

…ses and along the dermoepidermal junction. The purpuric nature of the papules results from extravasation of erythrocytes in the papillary dermis and often in the epidermis itself. The lichenoid purpura of Gougerot and Blum (lichen aureus), at an earl…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Urticarial Vasculitis?

…ermann disease, erythema multiforme, and the lichenoid purpura of Gougerot and Blum (lichen aureus), to mention but a few examples. Characterization of leukocytoclastic vasculitis clinically by a single image of palpable purpura does not do justice t…

Histologic Diagnosis of Inflammatory Skin Diseases

Advantages of the Algorithmic Method

…rpuric dermatitis Schamberg’s disease Lichenoid purpura of Gougerot and Blum Eczematid-like dermatitis of Doucas and Kapetanakis Diseases secondary to rubbing Lichen simplex chronicus Prurigo nodularis and its analogues (acanthoma fissuratu…

Histologic Diagnosis of Inflammatory Skin Diseases

Collagen

…sum; and those typified by long-standing lichenoid infiltrates of lymphocytes, such as lichen planus, disseminated superficial actinic porokeratosis, and some examples of the lichenoid purpura of Gougerot and Blum (and the neoplastic process, mycosis…

Histologic Diagnosis of Inflammatory Skin Diseases

Acroangiodermatitis of Mali/Stewart-Bluefarb syndrome

…rple patches, plaques, and nodules that simulate closely those of acroangiodermatitis of Mali. Pyogenic granuloma is a solitary friable papule or nodule that early in its course is ulcerated. Lichenoid purpura of Gougerot and Blum, when developed ful…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Fibrosing Dermatitis

…ctive bundles of collagen are a clue to a lichenoid infiltrate of lymphocytes having been present for years in the upper part of the dermis. Similar changes may be observed in some examples of long-sustained lesions of the lichenoid purpura of Gouger…