Annals of surgery . Boy From Post-Mortem. a. Bladder. b. Urachal cyst. The doited line represents the peritoneum. But it was quite a different matter in the foetal pig, of whichwe examined about 30. In the very early fcetus the bladderwas elongated, and it was frequent to see cysts which onecould easily record as urachal cysts, but no doubt they rap-idly close in late foetal life. In examining some 60 cows Isaw no urachal cysts, though the cow is quite subject to cyst-oma of the ovary and the functionless ducts of the broad liga-ment (especially Gartners duct). In a big bull I noticed thatthe
Annals of surgery . Boy From Post-Mortem. a. Bladder. b. Urachal cyst. The doited line represents the peritoneum. But it was quite a different matter in the foetal pig, of whichwe examined about 30. In the very early fcetus the bladderwas elongated, and it was frequent to see cysts which onecould easily record as urachal cysts, but no doubt they rap-idly close in late foetal life. In examining some 60 cows Isaw no urachal cysts, though the cow is quite subject to cyst-oma of the ovary and the functionless ducts of the broad liga-ment (especially Gartners duct). In a big bull I noticed thatthe urachus toward the bladder was quite thick. 340 F. B ROBINSON. In experimental intestinal work on dogs, I carefully post-mortemed about 175, but did not see one case of dilatedurachal cyst. I worked several years in dissecting rooms, pay-ing special attention to visceral and pelvic anatomy, but didnot see any urachal cyst in but one autopsy; which is repre-sented in figure i. Yet I saw much variation in the appear-. FiG. 2.—Multiple Urachal Cvsr. a. Bladder. b. Urachal cysts. The dotted line represents the peritoneum. ance of the urachal cord. Meckle and Hoffman each reporturachal cysts in pigs. Meckels case showed a cyst an inchin diameter, and Hoffmans looked like a double bladder. Sutton has seen a urachal cyst in a mole. However,the best method to study urachal anomalies is to examine alarge number of the embryos of the pig and cow in all stagesof uterine life. Then it is instructive to examine these samekind of animals immediately after birth. So far, I have been cySJS OF THE URACHUS. 34 ^ unable to examine the urachus of a horse. But both Gurltand Freer give excellent examples of urachal cysts in this ani-mal. I understand from veterinarians that the horse is one ofthe most typical animals to show urachal cysts, and that quitelate in horse foetal life the urachus is found often quite a dis-tance above the bladder. The perviousness or patency of the urachus has b
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectsurgery, bookyear1885
