Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…e of infundibular epidermis (e.g., pustules of acne vulgaris, rosacea, and halogenodermas) and of surface epidermis (e.g., pustules of psoriasis and all of the many variants of it clinically, among those being keratoderma blennorrhagicum, impetigo he…

Differential Diagnosis in Dermatopathology

Discussions

…also affects septa. Erythema nodosum and nodular vasculitis, like most panniculitides, are not of short duration, but tend to last, actively, for weeks and usually months. Individual lesions of nodular vasculitis may be especially longstanding. Depe…

Differential Diagnosis in Dermatopathology

Erythema nodosum vs. Nodular vasculitis

An inflammatory process caused by Mycobacterium tuberculosis. In the skin, it may be primary as a consequence of direct inoculation (tuberculosis verrucosa cutis) or secondary to a focus of tuberculosis in another organ (the lung for lupus vulgaris,…

Histologic Diagnosis of Inflammatory Skin Diseases

Fox-Fordyce disease

…ing of infundibula may be seen in inflammatory diseases as unalike as lichen planopilaris and discoid lupus erythematosus on one hand and noninflammatory conditions such as keratosis pilaris and phrynoderma on the other. The infiltrates of lymphocyte…

Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

…6;1:100. Marquart-Elbaz C, Cribier B.Facial dermatitis. Acne, rosacea, seborrheic dermatitis. Rev Prat 2002 1;52(19):2185–90. Pinkus H, Mehregan AH. The primary histologic lesion of seborrheic dermatitis and psoriasis. J Invest Dermatol 1966;46:109–1…

Histologic Diagnosis of Inflammatory Skin Diseases

Patient Handouts

…ons (30 KB)  Skin & Hair Care for Acne Patients (30 KB)  Skin Care after Treatment of Actinic Keratosis (95 KB)  Skin Care for Rosacea Patients (81 KB)  Skin Care in Atopic Dermatitis (69 KB)  Treatment Plan for Atopic Dermatitis (67 KB)…

Clinical Manifestations

Clinical Manifestations

For more clinical images of Rosacea, please see A Clinical Atlas of 101 Common Skin Diseases on Derm101.com….

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Acne vulgaris, erythematous papule Rosacea, erythematous papule 1. Only one follicle involved usually in a 4 mm biopsy specimen 1. Nearly all follicles involved usually in a 4 mm biopsy specimen 2. Suppurative infundibulitis prominent 2. Suppu…