Search Results for: excoriation

Differential Diagnosis in Dermatopathology

Psoriasis on volar skin vs. Dyshidrotic dermatitis

Papules, nodules, vesicles, and sometimes bullae that develop in response to “bites” of arthropods, among the most common offenders being mosquitoes, bedbugs, and mites of scabies….

Differential Diagnosis in Dermatopathology

Dermatitis herpetiformis vs. Bullous pemphigoid

Papules, nodules, vesicles, and sometimes bullae that develop in response to “bites” of arthropods, among the most common offenders being mosquitoes, bedbugs, and mites of scabies….

Differential Diagnosis in Dermatopathology

Discussions

…rmatitis herpetiformis, they typically being a consequence of excoriation induced by severe pruritus. The lesions of dermatitis herpetiformis commonly involve the scalp and are distributed symmetrically over the scapulae, sacrum, buttocks, and extens…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…stance, is factitious; by dint of a penetrating injury, often excoriation with the equivalent of talons, degenerated bundles of collagen come to ascend in an effort at extrusion and find themselves eventually in crusts atop an ulcer. Error: Perforati…

Histologic Diagnosis of Inflammatory Skin Diseases

Scar

…are consequent to injury external. The scar that results from excoriation tends to be thin and situated immediately beneath the epidermis. The terms scar, keloid, dermatofibroma, anetoderma, and poikiloderma are all generic, each conveying a sense fo…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatitis herpetiformis

…ss of epidermis and part of the papillary dermis secondary to excoriation. Crusts consist of serum, granulocytes, and, sometimes, red blood cells. Differential diagnosis histopathologic Bullous lupus erythematosus, linear IgA dermatosis, acquired epi…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…ive and deep, in the same manner as surface and infundibular epidermis 10. Involvement of epithelial structures of adnexa slight, if any, and superficial 11. No signs of excoriation 11. Signs of excoriation often, i.e., erosions, ulcerations, crusts…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…disease (transient acantholytic dermatosis) 1. No evidence of excoriation usually 1. Erosions, ulcerations, and scale-crusts, i.e., evidences of excoriation, present often 2. Focal parakeratosis in columns vertical 2. Little parakeratosis as a rule (…

Histologic Diagnosis of Inflammatory Skin Diseases

Grover’s disease

…ns of tissue of the disease often are complicated by signs of excoriation, namely, erosions, ulcers, and crusts. Those changes secondary may obscure the underlying acantholytic process. When Grover’s disease is suspected, sections must be scrut…