Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 446 LYMPHATIC SYSTEM. the glands, as they are buried sometimes in oedematous swellings of varying size. On the other hand, they may be painless on being touched, but swollen, hypertrophied, indurated, liardened or caseous. The deep-seated glands of the fore portion of the body comprise the retro-pharyngeal and the cervical chain running along the posterior border of the trachea. Normally these glands cannot be examined (Fig. 210) ; but when the seat of certain morbid processes, they
Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 446 LYMPHATIC SYSTEM. the glands, as they are buried sometimes in oedematous swellings of varying size. On the other hand, they may be painless on being touched, but swollen, hypertrophied, indurated, liardened or caseous. The deep-seated glands of the fore portion of the body comprise the retro-pharyngeal and the cervical chain running along the posterior border of the trachea. Normally these glands cannot be examined (Fig. 210) ; but when the seat of certain morbid processes, they may be so enlarged as even to be readily visible. The larynx and pharynx are then displaced downwards, the depression between the head and Fig. 211.—Lymphatic glands of the hmd quarter. GG, Precrural lymphatic gland; GF, lumbar lymphatic ; GP, popliteal lymphatic (deep-seated) ; GI, ischiatic lymphatic (deep-seated) ; GA, anal lymphatic (deep-seated). upper extremity of the neck disappears, together with the depression known as the jugular furrow. Such deformities may be either per- fectly symmetrical, as in lymphadenia, or (as is more commonly the case) asymmetrical, as in tuberculosis; and if inspection leaves any doubt, the glands may be further examined by palpation. To obtain the fullest information both hands should be used, one arm being passed over the neck and the fingers engaged behind the trachea. The operator may also stand in front of the animal, whose head should be lifted so that the points of the lingers can be thrust deeply inwards on either side of the trachea in the direction of the vertebral column.
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