The principles of surgery and surgical pathology : general rules governing operations and the application of dressings / by Hermann Tillmanns ; trans. from the 3rd German ed. by John Rogers, and Benjamin Tilton ; ed. by Lewis A. Stimson.

  • Tillmanns, Hermann, 1844-1927.
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: The principles of surgery and surgical pathology : general rules governing operations and the application of dressings / by Hermann Tillmanns ; trans. from the 3rd German ed. by John Rogers, and Benjamin Tilton ; ed. by Lewis A. Stimson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    often sweat glands. The contents usually consist of a fatty, yelloAvish or whitish, greasy mass, together with hairs, cartilage, bone, and even teeth. In very rare cases, brain, nerve, and muscle tissue or structures resembling extremities have been found. Occasionally the contents are oily (oil cysts). Kocher and Streit have laid emphasis upon a pecul- iarity possessed by these tumours—when not filled too full—of retain- ing for a considerable length of time any change of form wOiich is given them. This is due to their homogeneous cement-like contents. If epi- thelial cells and masses of fat are mixed with a large amount of hair, a peculiar crepitation may be felt on palpation of the tumour (Kocher), The dermoid tumours develop from stray cutaneous cells which have been inverted, as in tlie closure of embryonic clefts. At the same time cells of the entoderm may become displaced or separated. Polypous appendages are sometimes found upon different parts of the surface of the body. They are to be looked upon as abnormal dis- placements of tissue or malformations depending upon an imperfect closure of embi-yonic clefts. Such tumours or cutaneous appendages, occasionally containing cartilage, are found in the vicinity of the lines of closure of the dorsal or ventral clefts, or near the face, ears, neck, anal region, or the rhaphe of the perinseum (Chiari).