_Mixed Naevus._--As its name indicates, the mixed naevus partakes of the
characters of the other two varieties; that is, it is a subcutaneous
naevus with involvement of the skin.
It is frequently met with on the face and head, but may occur on any
part of the body. It also affects parts covered by mucous membrane, such
as the cheek, tongue, and soft palate. The swelling is rounded or
lobulated, and projects beyond the level of its surroundings. Sometimes
the skin is invaded by the naevoid tissue over the whole extent of the
tumour, sometimes only over a limited area. Frequently the margin only
is of a bright-red colour, while the skin in the centre resembles a
cicatrix. The swelling is reduced by steady pressure, and increases in
size and becomes tense when the child cries.
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