Melanocytic Lesions

A variety of melanocytic tumors exist. Benign tumors consist of mainly melanocytic nevi and benign vulvar melanosis (lentigo), while melanoma represents the most common malignant melanocytic tumor type.

Table 1 Acanthosis Nigricans

Clinical

Differential

Diagnosis

Symptoms

appearance

diagnosis

Therapy

Acanthosis

Asymptomatic

Found in

Addison's disease

Address underlying

nigricans

generally,

intertriginous

Intertrigo

cause

but may

areas

Hemochromatosis

Topical antibiotics

have

Areas of

Pellagra

Topical or systemic

pruritus

darkening and

Becker nevus

retinoids

and local

thickening of

Hypertrophic

Keratolytics

irritation

the skin; may

seborrheic keratosis

Corticosteroids

have a velvety

Ichthyosis hystrix

or warty

Linear epidermal nevus

appearance

Pemphigus vegetans

Hidradenitis

suppurativa

Removing Nevus Labia
Figure 2 Melanosis (lentigo). Diffuse pigmentation changes are present.

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