A system of practical medicine. By American authors. Vol. 3

by Unknown

The chief changes which the tumors may undergo are fibroid induration, suppuration, and caseation. The gradual increase of the stroma may give a high degree of density, and the gland on section may present a smooth, glistening appearance. Suppuration is most frequently seen when the growth reaches the skin; it may point and an abscess discharge. In the deep glands the formation of pus is not often met with. Caseation is extremely rare. Hemorrhages may take place from rupture of the thin-walled vessels.

The chief characters of the lesions in the different groups have been dealt with in the section on Symptoms. The superficial glands are most often attacked, and the cervical or axillary may form huge masses before there are any signs of internal trouble. The superficial and deep cervical groups may be uniformly affected, the muscles lifted and wasted, and vessels and trachea surrounded by a solid mass. Sometimes all distinction between the tissues is lost, and the carotids run in the midst of the new growth, which may extend far out beneath the trapezius and down into the chest or over the clavicle on to the outside. When the neck is not primarily affected the groups are more isolated, and can be traced as chains of enlarged glands along the trachea and the carotids continuous with those of the axillæ and mediastinum.

The axillary group is next involved in the order of frequency, and the masses when large grow out under the pectorals and back beneath the scapulæ and high into the fossa, compressing the axillary vessels and causing great swelling of the arm. In Case VII. the growth infiltrated the neighboring muscles and eroded the humerus and neck of the scapula, perforated the blade, and exuded on its outer surface. Though an enormous mass, the vessels were not infiltrated, and only moderately compressed. The inguinal glands when very large may obstruct the femoral artery and vein, and seriously interfere with the circulation in the legs.

Of the internal groups, those of the thorax are most often affected, and we may have the chain in the posterior mediastinum along the aorta and the sides of the trachea and gullet, and along them pass into the neck (Case V.), or the bronchial group may be primarily attacked, with the formation of a great bunch at the fork and numerous small masses along each bronchus at the root of the lung, which may be extensively involved (Case VI.); or those of the anterior mediastinum beneath the sternum may be affected, with the production of large masses extending over the pericardium and passing even to the diaphragm. In these cases bulging of the sternum and ribs, with erosion and perforation, may occur. In Case II. the sternum was completely destroyed to a level with the fourth rib. The heart may be pushed aside and the aorta and its branches completely surrounded by growths (Cases II. and VI.). It is remarkable in these cases that great vessels do not suffer more from compression. When the abdominal glands are involved, the retro-peritoneal are most frequently enlarged, and form a continuous chain from the diaphragm to the internal rings on either side of the aorta and its branches, extending into the pelvis. Pressure effects are not common, but they may compress the ureter, causing hydronephrosis, the sacral and lumbar nerves, the iliac veins, and, as in the case I mentioned, may adhere to the broad ligaments and uterus in such a way as to deceive the most skilled gynæcologist. The mesenteric glands may present slight enlargement, but in my experience they are but little affected, even when the retro-peritoneal are of large size. When the glands at the portal fissure are involved they may compress the vein and duct. Phelps of Chateaugay, N.Y., sent me a specimen in which the glands of this region formed two huge masses the size of cocoanuts, and, so far as I could ascertain, they were primary lympho-adenomatous growths. The possibility of ovarian disease had been discussed by several consultants.

The chief change is an increase of the cells with or without thickening of the reticulum. The cells correspond to ordinary lymph-corpuscles; some may be a little larger, with darker granules and more pronounced nuclei. Giant cells are frequently met with, more often in the small glands. I have not seen them in the large soft tumors. In the early stage there may be simple hyperplasia and the relations of the lymph-paths are maintained, but when the glands are much developed the normal arrangement is disturbed and they cannot be injected. The reticulum varies much; in the very soft form it is expanded and can scarcely be found; the substance may be semi-diffluent. The firmer the structure the more evident is it, and in the hard forms the network of fibres in whose meshes the cells are enclosed can be distinctly seen and by pencilling very clearly brought out. It is not merely a thickening of pre-existing fibres, but probably there is a new development of adenoid tissue. In some cases of advanced fibroid change very few cells can be seen. The vessels passing to the glands are sometimes dilated.

Spleen.—In about 75 per cent. this organ is hypertrophied or presents lymphoid growths (Gowers). The enlargement is not often great, rarely approximating the colossal size of the leukæmic organ. It is due to either simple hyperplasia or to the presence of the new growths, sometimes to both. In the 75 cases of enlarged spleen new growths occurred in 56 (Gowers). Of the 38 cases in Hutchinson's table, 27 presented the splenic tumors. These are grayish-white bodies, ranging in size from a small pea to a walnut or larger, scattered irregularly through the substance, usually rounded in outline, but in some instances irregularly shaped. They contrast by color strongly with the red spleen-pulp. The numbers may vary from one or two to many dozens, the spleen-substance being a mere remnant between them. These masses often resemble the lymph-glands in appearance and consistence. They are not encapsulated, but in immediate contact with the spleen-tissue. They originate from the Malpighian corpuscles, and may be regarded as the enlarged and developed lymph-elements in the spleen. The larger ones probably arise from the fusion of several small ones. When uniform in size and scattered throughout the organ, they may resemble coarse tubercles, but the absence of any caseation may serve to distinguish them. Their histological characters are those of the glands, lymph-corpuscles in a fibrous reticulum; the consistence depends on the preponderating element.

Amyloid degeneration was found by Gowers in two cases in the growths.

The thymus has been found involved in the mediastinal growths, and is occasionally affected primarily. The thyroid may be attacked by the cervical tumors.

The suprarenals may contain secondary growths. In Case VII. both were extensively involved.

The medulla of the long bones has been found converted into red lymphoid marrow, and in a few instances into the pyoid variety met with in leukæmia. It has been found normal in other cases.