File:Evolution and disease (1890) (14577439238).jpg

Identifier: evolutiondisease00blan (find matches)
Title: Evolution and disease
Year: 1890 (1890s)
Authors: Bland-Sutton, John, Sir, 1855-1936
Subjects: Diseases Medical genetics Abnormalities, Human Animals Disease Congenital Abnormalities
Publisher: New York : Scribner & Welford
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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critical analysis of facts further showsthat in man cancer is more common than infectivetumours. In domesticated mammals cancer, in thesense in which it will be employed later, is unusual,whilst infective tumours are extremely common. In wildanimals nearly all the tumours belong to the infectivegranulomata, only a few cases of cancer being known.It may be useful to detail one or two typical specimensof sarcomata from animals. The first is a round-celled sarcoma growing in thesubcutaneous tissues of the neck of a hen. It is of thesize of a chestnut, and is surrounded by a capsule of TUMOURS AND CANCERS, 237 fibrous tissue. On section it has a pale yellow colour,and is elastic to the touch. When portions of the tumourwere hardened, and thin sections prepared for the micro-scope, it was found to be made up of a multitude ofclosely-packed round cells, with here and there slenderfibrillae of delicate tissue passing between them ; occa-sionally a giant-cell, with many nuclei, was seen. The
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Fig. 120.—The head of a Fowl, with a sarcoma growing inthe subcutaneous tissue. general appearance of the tumour may be inferred fromthe drawing in fig. 120. In this case the sarcoma grewin the subcutaneous tissue, and was of small size; butsuch tumours may grow in any situation of the body,sometimes in bones, where they attain a very large size ;in the brain, eye, intestine, limbs, &c. I have examined 238 E VOL UTION AND DISEASE. tumours in fish, frogs, birds, snakes, marsupials, rodents,carnivora, quadrumana, and ruminants. When sarcomata grow from bone, especially fromthe interior of a bone, they usually possess large num-bers of giant-cells. When originating in pigmentedspots such as the black or pigment coat of the eye, orthe pigment layer of the skin, they are of a deep blackcolour, and named in consequence melanotic. Greyhorses are especially liable to this form of tumour, yetwe have no reason to believe that the coloured races ofmankind are more or even so prone to them

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