State the prognosis.

Cutaneous horns may be readily and permanently removed.

What is the treatment?

Treatment consists in detachment, and subsequent destruction of the base; the former is accomplished by dissecting the horn away from the base or forcibly breaking it off, the latter by means of any of the well-known caustics, such as caustic potash, chloride of zinc and the galvano-cautery.

Another method is to excise the base, the horn coming away with it; this necessitates, however, considerable loss of tissue.

Verruca.

(Synonym: Wart.)

What is verruca?

Verruca, or wart, is a hard or soft, rounded, flat, acuminated or filiform, circumscribed epidermal and papillary growth.

Name the several varieties of warts met with.