Search Results for: acanthosis

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A Clinical Atlas of 101 Common Skin Diseases

Acanthosis Nigricans

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Pigmented plaques formed by confluence of smooth-surfaced soft papules, some of which may become polypoid, traversed by accentuations of skin folds.

A Clinical Atlas of 101 Common Skin Diseases

Acanthosis Nigricans

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…

Therapeutic Strategies in Dermatology

Oral Hairy Leukoplakia: Key Points

…ures including epithelial hyperkeratosis with papillomatosis, acanthosis, and ballooning degeneration within the epidermis. Viral changes can also be noted and also detected by immunohistochemistry or by in situ hybridization. Since the EBV infection…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Benign, Pseudo, or Malignant Acanthosis Nigricans?

“Benign acanthosis nigricans begins at birth or in childhood or appears at puberty. In any case, it becomes accentuated during the adolescent period. When adolescence is over, the dermatosis either regresses or remains stationary.” &#82…

Differential Diagnosis in Dermatopathology

Nevus verrucosus vs. Acanthosis nigricans

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…

A Clinical Atlas of 101 Common Skin Diseases

Seborrheic Dermatitis

An inflammatory process that consists of tiny papules covered by prominent scales and localized typically to the “seborrheic region,” namely, scalp, forehead, eyebrows, malar eminences, paranasal and nasolabial folds, and retroauricular…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Perivascular Dermatitis

…pongiotic dermatitis”) (see Fig. 5.21), or psoriasiform acanthosis is apparent (“psoriasiform dermatitis”) (see Fig. 5.22). Not uncommonly, more than one of those four patterns is evident concurrently, for example, interface dermati…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…is, psoriasiform + 10.23.1B: Orthokeratosis, hypergranulosis, acanthosis, proliferation of infundibular and eccrine ductal keratocytes, and coarse bundles of collagen in vertical streaks = Lichen simplex chronicus (“epidermal and dermal”…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ascular dermatosis, lichenoid + 11.11.2B: Lymphocytes, jagged acanthosis, necrotic keratocytes in the epidermis, a thick granular layer, and mostly compact orthokeratosis = Lichen planus-like keratosis, fully developed  Episodically, lichen planus-li…

Differential Diagnosis in Dermatopathology

Discussions

Nevus verrucosus and acanthosis nigricans are processes that affect the papillary dermis and the epidermis. Both conditions may display hyperkeratosis, epidermal hyperpigmentation, papillomatosis, melanophages, and an increased number of fibrocytes…

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