Search Results for: acanthosis

Differential Diagnosis in Dermatopathology

Psoriasis vs. Nummular dermatitis

Pigmented plaques formed by confluence of smooth-surfaced soft papules, some of which may become polypoid, traversed by accentuations of skin folds. This disease has a predilection for intertriginous regions. The condition may develop consequent to…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…: Perivascular dermatitis, spongiotic + 10.2.4B: Lymphocytes, a focus of fibroplasia in the upper part of the dermis, slight acanthosis, hypergranulosis, and compact orthokeratosis = Allergic contact dermatitis, late The compact orthokeratosis and…

Dermoscopy of a single plaque on finger

Dermoscopy of a single plaque on finger

…capillaries congested with red blood cells in the upper dermis (Figure 3). Figure 3. Photomicrograph showing hyperkeratosis, acanthosis, elongated rete ridges, dilated thin walled capillaries congested with red blood cells. (H&E,400X)….

Histologic Diagnosis of Inflammatory Skin Diseases

Toxic shock syndrome

…ry units in the epidermis Ortho- and parakeratosis Late All the changes seen in lesions developed fully with the addition of acanthosis, clusters of necrotic keratocytes in the epidermis, tiny abscesses in the epidermis, and scale-crusts that…

Histologic Diagnosis of Inflammatory Skin Diseases

Syphilis

…he first few weeks of its course chronological, changes striking in the epidermis are common, among those being psoriasiform acanthosis, pallor of keratocytes, especially those in the upper part of the viable epidermis, and neutrophils, particularly…

Histologic Diagnosis of Inflammatory Skin Diseases

Gianotti-Crosti disease

…er part of the dermis. Differential diagnosis histopathologic Pityriasis rosea usually is marked by less spongiosis and less acanthosis, except for the presentation of it in some dark-skinned individuals. Allergic contact dermatitis and nummular…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

…er part of the dermis Marked edema of the papillary dermis Dilated spiraled capillaries in thin dermal papillae Psoriasiform acanthosis with rete ridges of equal length, some of them thin Suprapapillary plates thin Slight spongiosis in the lower…