Search Results for: scale

Histologic Diagnosis of Inflammatory Skin Diseases

Impetigo contagiosa

…opathologically, in evolving and fully developed lesions, they show spongiform and subcorneal pustules, and in late lesions, scale-crusts laden with neutrophils. Clinically, bullous impetigo, which is nothing other than a blistering manifestation of…

Histologic Diagnosis of Inflammatory Skin Diseases

Photoallergic dermatitis

…cytes Marked edema of the papillary dermis Slight acanthosis Spongiotic vesicles Cornified layer either normal or covered by scale-crusts Late Superficial or superficial and deep perivascular and interstitial infiltrate of lymphocytes mostly Uneven…

A keratoacanthoma with venous invasion

A keratoacanthoma with venous invasion

…eratin surrounded by a white area, which merged to a pink area peripherally. It was not tender to palpation and some surface scale was evident. Figure 1. (A) A new raised lesion is present on the left forehead. (B) Close-up imaging reveals central…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…in this wedge-shaped infundibulocentric infiltrate are present also in infundibular and surface epidermis, especially in the scale-crust. This condition, still thought by some authors to be related to Mucha-Habermann disease, is not an inflammatory…

Histologic Diagnosis of Inflammatory Skin Diseases

Pruritic urticarial papules and plaques of pregnancy

…mmatory cells and, at times, by foci of spongiosis. Slight edema in the upper part of the dermis also may contribute. Subtle scale consists of parakeratotic cells. Differential diagnosis histopathologic Urticaria spares the epidermis, and the…

Histologic Diagnosis of Inflammatory Skin Diseases

Arthropod assaults

…ter of the lesion is a clue to an insect “bite.” A vesicle, vesiculopustule, erosion or ulceration, and crust or scale-crust in a single focus directly above the base of a wedge-shaped infiltrate of inflammatory cells is a clue to an…

Histologic Diagnosis of Inflammatory Skin Diseases

Histiocytosis X

…infiltrates of abnormal Langerhans’ cells situated mostly in the upper part of the dermis. What seem clinically to be scales actually are scale-crusts formed by parakeratosis, serum, and inflammatory cells, especially neutrophils….