Seborrheic Keratosis

Conception

It is a kind of benign pigmented disease occurring to the old which appears in patch or spot, so it is also named senile warts, senile plaques.

Clinical feature

1. Can occur in any part of body, especially in the head, body and arms;
2. The surface is smooth and it will grow larger with age. The edge becomes clearer and the surface is a little elevating.
3. Brown or black.
4. No symptoms, no selfhealing tendencies.
5. Related with season and sunshine.
6. Mostly seen on the skin of the old.

Histopathology

It is caused by the epidermal basal cells with papilloma-like hyperplasia, and melanocyte also proliferated.

Method of treatment

Q-switched ND:YAG laser (1064nm and 532 nm).
CO2 fractional laser is especially effective to the senile plaques elevating the skin.