An introduction to pathology and morbid anatomy / by T. Henry Green.

Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to pathology and morbid anatomy / by T. Henry Green. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    165/472 (page 137)
    THE OSTEOMATA. The Osteomata, or osseous tumours, are tumours consist- ing of osseous tissue. A new formation of bone occurs under various circumstances. Irritative conditions of tlie bone and periosteum are often attended by a large forma- tion of new bone. This is seen after fractures, in wbicb. tbere is not only a formation of bone from the bone itself, but also from the periosteum and adjacent fibrous structures (permanent and provisional callus). Chronic inflammation of the periosteum is also fre- quently followed by thickening of the bone beneath it. These, however, are inflammatory formations, and have not an independent growth like the osseous tumours. Structtjiie.—Osseous tumours resemble in structure normal bone. There are three histological varieties :— 1. The Ehtirnated Osteomata.—These consist of dense, compact, osseous tissue. The lamellae are arranged con- centrically and parallel to the surface of the tumour. There is a complete absence both of blood-vessels and of cancellous tissue. 2. The Compact Osteomata.—These are formed of a tissue similar to that of the compact tissue of the long bones; differing only in the arrangement of the Haver- sian canals and canaliculi, whicli is less regular than in normal bone. 3. The Gancelloiis Osteomata.—These consist of cancel- lous osseous tissue, which is usually surrounded by a thin layer of denser bone. The medullary spaces may contain embryonic tissue, a fibrillated tissue, or fat.