Clinical Case Studies

Rhinophyma with Basal Cell Carcinoma

…t nasal dorsum. (Figure 1) The patient had long-standing acne rosacea and had been treated with topical metronidazole for 7 years followed by azelaic acid gel for 2 years prior to presentation. He had noticed increasing prominence of the nodule on th…

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

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…

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…

Differential Diagnosis in Dermatopathology

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)…

Differential Diagnosis in Dermatopathology

Images

Acne vulgaris, erythematous papule Rosacea, erythematous papule…

Phymatous Subtype

Phymatous Subtype

…arophyma).  Almost exclusively in males. This severe form of rosacea requires maximizing medical therapy with systemic antibiotics, and sometimes use of isotretinoin.  Once the medical regimen has been maximized, the patient is a candidate for surgi…

Clinical Manifestations

Clinical Manifestations

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