A Clinical Atlas of 101 Common Skin Diseases

Hemangiomas, Vascular Malformations, and Ectasias

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An hemangioma is a benign neoplasm of blood vessels, a vascular malformation is an aberration in development of one or more major vascular structures, and an ectasia is a dilation of a preexisting end vessel.

Therapeutic Strategies in Dermatology

Spider Bites: Key Points

Key Points Spiders are 8-legged (arthropod) members of the order Araneae. Spider bites result from a self-defense reaction when a spider feels threatened and typically arise due to inadvertent meeting with a spider (i.e., accidental). There are sev…

Therapeutic Strategies in Dermatology

Spider Bites: Treatment

…welling, and necrosis. This diagnosis is much more likely than spider bite in nonendemic areas. Bites of the black widow spider (Lactrodectus mactans) First steps First-line therapy: Elevate, rest, and apply cool compresses to the area of the bite,…

Therapeutic Strategies in Dermatology

Vascular Birthmarks: Initial Evaluation

Initial Evaluation Hemangioma of infancy Port-wine stain Differential diagnosis Cherry hemangioma Tufted hemangioma Spider angioma Lymphangioma circumscriptum…

Therapeutic Strategies in Dermatology

Spider Bites: Clinical Case

…ase 18-year-old male teenager is bitten by a brown recluse spider while camping in the forest located in the south-central US; the spider was visualized but not captured The bite is exquisitely painful but he reports no systemic symptoms Since re…

Therapeutic Strategies in Dermatology

Venous Stasis: Key Points

Key Points Chronic venous insufficiency stems from the acquired incompetence of venous valves that prevent retrograde blood flow through the venous system, resulting in complications, including edema, prominent veins, stasis dermatitis, and ulcers….

Therapeutic Strategies in Dermatology

Stings: Initial Evaluation

Initial Evaluation Differential diagnosis Spider bite Bullous arthropod assault Fleabites…

Dermatology Practical & Conceptual

From the Dermatologikum Hamburg: Quiz

The patient A 48-year-old woman presented herself with an erythematous macule on the extensor surface of the right thigh. The lesion had been present for years, but recently the patient noticed some increase in size and changes in the coloration. Th…

Histologic Diagnosis of Inflammatory Skin Diseases


Images 10.5.1A: Perivascular and interstitial dermatitis + 10.5.1B: Lymphocytes and eosinophils around venules, and neutrophils in the interstitium in conjunction with degeneration of bundles of collagen focally = Response to an arthropod…