lar vessels; anterior or pectoral groups lie behind the
pectoralis minor, along the medial side of the axillary vein, and an
inter-pectoral group, between the two pectoral muscles. The axillary
glands receive lymph from the arm, mamma, and side of the chest, and
pass it on into the lowest cervical glands and the main lymph trunk.
They are frequently the seat of pyogenic, tuberculous, and cancerous
infection, and their complete removal is an essential part of the
operation for cancer of the breast.

#Lower Extremity.#--_The popliteal glands_ include one superficial gland
at the termination of the small saphenous vein, and several deeper ones
in relation to the popliteal vessels. They receive lymph from the toes
and foot, and transmit it to the inguinal glands. _The femoral glands_
lie vertically along the upper part of the great saphenous vein, and
receive lymph from the leg and foot; from them the lymph passes to the
deep inguinal and external iliac glands. The femoral glands often
participate in pyogenic infections entering through the skin of the toes
and sole of the foot. _The superficial inguinal glands_ lie along the
inguinal (Poupart's) ligament, and receive lymph from the external
genitals, anus, perineum, buttock, and anterior abdominal wall. The
lymph passes on to the deep inguinal and external iliac glands. The
superficial glands through their relations to the genitals are
frequently the subject of venereal infection, and also of epithelioma
when this disease affects the genitals or anus; they are rarely the seat
of tuberculosis. _The deep inguinal glands_ lie on the medial side of
the femoral vein, and sometimes within the femoral canal. They receive
lymph from the deep lymphatics of the lower limb, and some of the
efferent vessels from the femoral and superficial inguinal glands. The
lymph then passes on through the femoral canal to the external iliac
glands. The extension of malignant disease, whether cancer or sarcoma,
can often be traced along these deeper lymphatics into the pelvis, and
as the obstruction to the flow of lymph increases there is a
corresponding increase in the swollen dropsical condition of the lower
limb on the same side.

The glands of the _thorax_ and _abdomen_ will be considered with the
surgery of these regions.

INJURIES OF LYMPH VESSELS

Lymph vessels are divided in all wounds, and the lymph that escapes from
them is added to any discharge that may be present. In injuries of