A textbook of obstetrics . blood-vessels thus exposed are liable to laceration during labor, usu-ally with a fatal result to the fetus unless delivery is quicklyeffected. Umbilical Hernia.—Occasionally children are born with agreater or less portion of the abdominal contents protruding intothe umbilical cord and covered by nothing but the distended andattenuated amnion. There has been an arrest of development in n8 PREGNANCY. the abdominal walls, preventing the completion of the arching-over process by which the abdominal cavity is closed. Cysts of the Cord.—Cystic formations in the cord are d
A textbook of obstetrics . blood-vessels thus exposed are liable to laceration during labor, usu-ally with a fatal result to the fetus unless delivery is quicklyeffected. Umbilical Hernia.—Occasionally children are born with agreater or less portion of the abdominal contents protruding intothe umbilical cord and covered by nothing but the distended andattenuated amnion. There has been an arrest of development in n8 PREGNANCY. the abdominal walls, preventing the completion of the arching-over process by which the abdominal cavity is closed. Cysts of the Cord.—Cystic formations in the cord are dueeither to an abnormally fluid condition of the mucous tissue orelse t i .1 collection of serum in the pedicle of the allantois, whichin horses, swine, and cows is found persisting as a vesicle up tothe time of birth. Calcareous Degeneration.— This condition of the cord isoccasionally found and is usually associated with syphilis. Thelime may be deposited in the walls of blood-vessels or in thesubstance of the Fig. 105.—Tumor of the cord : c, c, c, Cord; T, tumor (Budin), Tumors of the Cord.—Tumors of the cord may be cysts,localized hypertrophies, or accumulations of the mucous tissue,hematomata, a small fetus amorphus, as in Budins rase (), and telangiectatic myxosarcomata. The last named shouldbe excised immediately after birth, with, perhaps, the umbilical nn<r. 1 V. Winckel, Centralbl|( 1 •• d four others. f. (iyi)., 1894, p. 397« reported one case and col- THE DECIDUjE. i 59 THE DECIDUAE. The explanation which John Hunter gave of the plates pub-lished by his brother William l was, for a long time, accepted asthe true history of the development of the uterine membrane whichenvelops the fetus at term. According to the Ilunterian theory,the uterus throws out upon its inner surface an inflammatoryexudate forming a closed sac whose walls stretched across theopenings of the tubes and the os internum cervicis. As the im-pregnated ovule enters the
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
