Seborrheic keratosis

A seborrheic keratosis is a benign skin growth that is very common among people over 40 years of age.
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Seborrheic keratosis n. A superficial, benign, verrucose lesion consisting of proliferating epidermal cells enclosing horn cysts, usually appearing [more]Seborrheic keratosis - Community and Resources

Noun
1. a skin condition characterized by circumscribed wartlike lesions that can be itchy and covered with a greasy crust
(hypernym) keratosis

A benign skin lesion resulting from excessive growth of the top layer of skin cells. It usually is found in persons over 30 years old and may be few or numerous.