Annals of surgery . losed cavity in theurachus may remain dormant for years, and then take on path-ological condition. Any part of the urachus may dilate, butthe part next to the bladder seems the most liable, as that isthe last portion to become functionless. The frequency of cystic dilatations of the urachus is difficultto estimate. I examined some 40 sheep, but did not notice atrace of a dilated urachus. In examining the pelvic organs of150 sows, I was wonderfully impressed how much the sow wassubject to most kinds of cystic dilatations. Cystic ovaries wereastonishingly common. Dilatation o
Annals of surgery . losed cavity in theurachus may remain dormant for years, and then take on path-ological condition. Any part of the urachus may dilate, butthe part next to the bladder seems the most liable, as that isthe last portion to become functionless. The frequency of cystic dilatations of the urachus is difficultto estimate. I examined some 40 sheep, but did not notice atrace of a dilated urachus. In examining the pelvic organs of150 sows, I was wonderfully impressed how much the sow wassubject to most kinds of cystic dilatations. Cystic ovaries wereastonishingly common. Dilatation of the mesonephritic tubulesand Gartners duct were frequent. Dilated cysts of the broad CySJS OF THE URACHUS. 339 ligament were often seen, but these are likely dilated lym-phatics. Cysts of the urachus in the sow are quite rare, butwe can observe that the urachal cord is uneven in thickness,and no doubt from these little bulges occasionally arise thecysts. However, I did not see a cyst as large as a bean in150 Fig I.—Urachal Cyst of a 10 Year Old 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-s
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectsurgery, bookyear1885
