Differential Diagnosis in Dermatopathology

Discussions

…lanus share several findings histopathologic, among them being perivascular, peri-infundibular, and perifollicular infiltrates of lymphocytes, vacuolar alteration at the junction between infundibula and dermis, infundibula plugged by orthokeratotic c…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…e dermis as a rule 4. Moderately dense superficial and deep, perivascular and interstitial, mixed-cell infiltrate; sometimes superficial only 4. Sparse superficial and deep perivascular and predominantly interstitial mixed-cell infiltrate; sometime…

Differential Diagnosis in Dermatopathology

Discussions

…s secondary syphilis. Lichen striatus often is associated with peri-infundibilitis and perifolliculitis, eccrine adenitis, and edema of the papillary dermis, three findings that are not present in lichen nitidus. The combination of spongiosis and lic…

Differential Diagnosis in Dermatopathology

Discussions

In an urticarial reaction to an assault by an arthropod and in lesions of true urtica, the infiltrate of inflammatory cells is mixed, contains at least lymphocytes and usually eosinophils, and is accompanied by extravasated erythrocytes and edema of…

Differential Diagnosis in Dermatopathology

Discussions

…; alopecia may result from infiltrates of mononuclear cells in peri-infundabular and perifollicular array. In cases suspected of being secondary syphilis, demonstration of the causative spirochete, Treponema pallidum, confirms the diagnosis. Various…

Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

Seborrheic dermatitis Synonyms Seborrhoeic dermatitis Seborrheic eczema Unna disease Presentation stereotypical Age and sex Young adults especially and males in particular Distribution of lesions Face, scalp, retroauricular area, and V region of the…

Histologic Diagnosis of Inflammatory Skin Diseases

Necrobiosis lipoidica

…yellow. Findings histopathologic Early Superficial and deep perivascular infiltrate of lymphocytes and neutrophils, and interstitial infiltrate of neutrophils Neutrophils present in septa of the subcutaneous fat and at the periphery of fat lobules…

Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

Keloid Presentation stereotypical Age and sex Young adults especially, both sexes, more often in darkly pigmented individuals, especially Africans and African-Americans Distribution of lesions Sternal region, ear lobes, shoulders, and the upper part…

Histologic Diagnosis of Inflammatory Skin Diseases

Mucha-Habermann disease

Mucha-Habermann disease Synonyms Pityriasis lichenoides Presentation stereotypical Age and sex Children and young adults especially; more common in males Distribution of lesions Widespread, particularly arms, legs, trunk, and buttocks Arrangement of…