elled out
after dividing the overlying soft parts. In the follicular variety, it
is usually sufficient to excise a portion of the wall, scrape out the
interior, and remove any tooth that may be present. The cavity is then
packed and allowed to heal from the bottom.

#Fibroma.#--A fibroma is a tumour composed of fibrous connective tissue.
A distinction may be made between the _soft fibroma_, which is
comparatively rich in cells and blood vessels, and in which the fibres
are arranged loosely; and the _hard fibroma_, which is composed of
closely packed bundles of fibres often arranged in a concentric fashion
around the blood vessels. The cut surface of the soft fibroma presents a
pinkish-white, fleshy appearance, resembling the slowly growing forms of
sarcoma; that of a hard fibroma presents a dry, glistening appearance,
aptly compared to watered silk. The soft variety grows much more rapidly
than the hard. In certain fibromas--in those, for example, which grow
from the periosteum of the base of the skull and project into the
naso-pharynx--the blood vessels are dilated into sinuses and have no
proper sheaths; they therefore tend to remain open when divided, and to
bleed excessively. Transition forms between soft fibroma and sarcoma are
met with, so that in operating for their removal it is safer to take
away the capsule along with the tumour, and the patient should be kept
under observation in view of the risk of recurrence.

The skin--especially the skin of the buttock--is one of the favourite
seats of fibroma, and it may occur in a multiple form. It is met with
also in the subcutaneous and intermuscular cellular tissue, and in the
abdominal wall, where it sometimes attains considerable dimensions.
Various forms of fibroma are met with in the mamma and are described
with diseases of that organ. The fibrous overgrowths in the skin, known
as _keloid_ and _molluscum fibrosum_, and those met with in the _sheaths
of nerves_, are described elsewhere. Fibroid tumours of the uterus are
described with myoma.

_Diffuse fibroma_ or _Fibromatosis_, analogous to lipomatosis, is met
with in the connective tissue of the skin and sheaths of nerves, and
constitutes one form of neuro-fibromatosis; a similar change is also met
with in the stomach and colon.

#Myxoma.#--A myxoma is composed of tissue of a soft gelatinous,
semifluid consistence. The pure myxoma is extremely rare, and
clinically resembles the lipoma. Myxomatous tissue is,