Search Results for: itch-scratch sequence

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Differential Diagnosis in Dermatopathology

Discussions

…ing and their characteristics in culture indicate that they are rickettsiae of the Rochalimaea family and not bacilli of cat-scratch disease as was thought when the organisms first were detected. The name now given to the organism is Rochalimaea…

Differential Diagnosis in Dermatopathology

Pyogenic granuloma vs. Bacillary angiomatosis

A papular and pustular inflammatory process that is centered in follicles and is distributed mostly in the middle third of the face in both vertical and horizontal directions. Among the varied manifestations of rosacea are innumerable…

Histologic Diagnosis of Inflammatory Skin Diseases

Scrofuloderma

…i, transported by copious amounts of caseous necrosis, are carried to the surface of the skin through numerous sinuses. This sequence of events is a reflection of how depressed severely is the resistance immunologic of the host to tubercle bacilli….

Histologic Diagnosis of Inflammatory Skin Diseases

Lupus vulgaris

…us, e.g., “butterfly blush” and classic discoid, tend to be bilateral. Lupus vulgaris results from the following sequence of events: tubercle bacilli, having been inhaled, cause pulmonary tuberculosis in one or both lungs; bacilli travel…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…Spongiform pustules = Psoriasis, pustular As neutrophils traverse the epidermis, they may come to assume the appearance, in sequence, of a “Munro’s microabscess,” “spongioform pustule,” “subcorneal…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…fibroplasia, in turn interspersed, among sebaceous lobules + 10.94.10C + 10.94.10D + 10.94.10E + 10.94.10F = Rhinophyma The sequence of events in this lesion of rhinophyma was rupture of infundibular cysts, suppurative peri-infundibulitis followed…

Histologic Diagnosis of Inflammatory Skin Diseases

Epidermis

…ess, assume a round shape. The phenomenon occurs in conditions as disparate as pemphigus vulgaris, where it develops as a consequence of the effect of autoantibodies against desmoglein 3, pemphigus foliaceus in which the autoantibodies are directed…

Histologic Diagnosis of Inflammatory Skin Diseases

Definition of Inflammation in Historical Perspective

…ccur only in tissue that is vascularized. Following injury to the skin, an organ that is vascularized richly, there ensues a sequence of responses of blood vessels of small caliber (transient vasoconstriction, arteriolar dilation, increased rate of…

Histologic Diagnosis of Inflammatory Skin Diseases

Cells That Mediate Inflammation (Inflammatory Cells)

…Because platelets usually cannot be identified with surety in sections stained by hematoxylin and eosin, they are not of consequence in diagnosis histopathologic of inflammatory skin diseases as that is set forth in the method advanced in this…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…in a thinned infundibulum that in loci no longer in contiguity with adjacent dermis = Keratosis pilaris The changes are a consequence of steadily increasing pressure applied by a plug of cornified cells against infundibular epidermis, thereby…

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