TUMORS OF THE LIVER. NEW GROWTH.
Largely secondary, from stomach, intestine, lymph glands, spleen, pancreas; the hepatic tumor may be disproportionately large. In horse: sarcoma rapidly growing soft, succulent, slow-growing, fibrous, tough, stroma with round or spindle shaped cells and nuclei. Symptoms: emaciation, icterus, enlarged liver, rounded tumors on rectal examination. Melanoma, in old gray or white horses, with similar formations elsewhere; not always malignant. Lymphadenoma. Angioma. Carcinoma. Epithelioma, lesions, nodular masses, white or grayish on section, and having firm stroma with alveoli filled with varied cells with refrangent, deeply staining, large, multiple nuclei, cancerous cachexia and variable hepatic disorder. In cattle: sarcoma, adenoma, angioma, cystoma, carcinoma, epithelioma. In sheep: adenoma, carcinoma. In dog: lipoma, sarcoma, encephaloid, carcinoma, epithelioma. Wasting and emaciation, yellowish pallor, temporal atrophy, ascites, liver enlargement, tender right hypochondrium, dyspepsia, symptoms of primary deposits elsewhere.
The great quantity of blood which passes through the liver lays it open, in a very decided way, to the implantation of germs and biological morbid products. Hence tumors of the liver are largely secondary, the primary ones being found mostly in the stomach, intestine, abdominal lymph glands, spleen and pancreas. The primary neoplasm is often comparatively small, while the hepatic one supplied with a great excess of blood may be by far the most striking morbid lesion. The hepatic tumors are mostly of the nature of angioma, sarcoma, melanoma, adenoma, lipoma, cystoma, carcinoma, and epithelioma.