Seborrheic keratoses are raised, skin-colored to dark brown/black lesions. They are well demarcated.
Clinically, the surface is rough. Follicular plugging (keratin cysts) is usually evident.
Although common on the face and trunk, these lesions can appear almost anywhere except the mucous surfaces and the palms and soles. Flat variants are common on the lower legs.
There is no malignant potential.
- Seborrheic keratoses respond well to liquid nitrogen cryotherapy.
- They also can be treated with electrofulguration and curettage where the curette is used to remove the electrofulgurated seborrheic keratosis.
- Irritated or darkly pigmented seborrheic keratoses may sometimes need biopsy to distinguish them from cutaneous melanoma.
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