are soft, painless swellings, sometimes of great size; though usually
single, as many as a dozen may be present in the same individual .
Lipomata are also found in the abdominal cavity, growing from the
sub peritoneal layer of fat.
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FIG. 5.—Lipoma of the palm. What is known as a dffuse lipoma (fi . 6) consists of a generalized overgrowth of the subcutaneous fat o the neck, and this may be t . so extensive as to obliterate he outline of the Jaw.
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FIG. 6.-Difiuse lipoma of neck. Fibroma (fig. 7).-Of tumours containing fibrous tissue, by far the most important are the fibroids of the uterus. A better name
for these tumours would be
Fibrornyomata, as they always
contain a varying proportion
of muscle fibres. They originate
in the wall of the uterus,
but generally come to project
either internally into the
cavity of the uterus, or externally
into the peritoneal
cavity; and often their sole
Connexion with the uterine
wall is a stalk or pedicle
formed from the capsule of
the tumour. Fibromyomata
of the uterus are most common
from 35 to 45 years of
age; in girls under 20 they
unknown. They
are almost
may attain a great size and
multiple. They
are often
seem to be equally common
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and unmarried in married FIG. 7.—Uterus in sagittal section Women- N0t eV¢1'Y fibfoid is showing interstitial and sub mucous 3 50Ul'C€ Of danger 0' d1SC0m iibroids. fort, for in the majorit of cases they are discovered by chance or not until after death. On the other hand they may give rise to severe symptoms, and that in many different ways. First, the may cause haemorrha e prolonged over years so that the health is entirely ruined. gecondly, they may become inflamed and septic, and lead to severe blood-poisoning. Next, for some unknown reason, a fibroid tends to prevent conception, whilst, should pregnancy occur, labour is greatly impeded. Finally, it seems to be established that a fibroid may occasionally become converted into a sarcoma. Examples of pure fibrous tissue tumours are the small multiple growths of the subcutaneous tissue, known as Painful subcutaneous nodule, and the irregular outgrowth from the gum known as Epulis. A Myoma is composed of unstriped muscle fibres. It is a rare tumour sometimes found in the oesophagus, stomach and bladder, Osteoma (fig. 8).-Bony tumours not infrequently arise from the bones of the head or face. They grow very slowly, and are so hard FIG. 8.-Osteoma of the left frontal sinus (seen from below). that surgical removal may be very difficult. They also occur as irregular out rowths from the bones of the limbs. and are then known as Exostoses gfig. 9). A common site for these is the inner and lower end of the femur, at the point of attachment of the adductor muscle, and Such a tumouf Seems to originate from an ossification of the tendon of this muscle.
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FIG. 9.—Exostosis of the femur Pfoduced bY the 0SSl5Catl0U Of the FIG. Io.-Multiple chondromata tendon of the adductor magnus. of the finger5
§ 'hondroma (fig. Io).-Cartilaginous tumours are *often found in children and' young people growing from the bones of the limbs in the neighbourhood of the joints. They are frequently multiple, especially in the hands and feet. These tumours grow slowly and are quite painless. Should removal be necessary, it is usually an easy matter.
Qdontgmaf-Several varieties of this tumour have been described arising in Connexion with the teeth and due to delayed or faulty development. They' may cause great deformity of the jaw.
A Myxoma is composed of loose, gelatinous connective tissue similar to that found in the umbilical cord. Some nasal polypi seem to be of this nature, but true myxomatous tumours are rare. It is, however, not uncomm on for a fibroma or a sarcoma to be converted by degeneration into myxomatous-like tissue.
Neuroma.-A pure neuroma is very uncommon, but a tumour known as a Pseudo-neuroma (fig. II) is often found in the course of a nerve. This is formed by a localized overgrowth of the fibrous tissue of the nerve sheath.
Glioma.—This variety of tumour arises from the neuroglia, the