Clinic for Ruminants, Vetsuisse Faculty, Bremgartenstr. 109a, 3012 Berne, Switzerland.
Vet Pathol. 2011 Jul;48(4):830-3. doi: 10.1177/0300985810383872. Epub 2010 Oct 6.
A 2-year-old Red Holstein cow was presented with uterine torsion at 235 days of pregnancy. The fetus extracted by cesarean section had weak vital signs and marked abdominal distention. An edematous pouch that contained tubular structures with peristaltic activity was associated with the umbilical cord. Because of poor prognosis, both dam and fetus were euthanized. At necropsy, the fetus had severe distention of the forestomachs, abomasum, and proximal small intestine; absence of distal small intestine, cecum, and proximal colon; atresia of the 2 blind ends of the intestine; and atrophy of distal colon and rectum. The tubular structures associated with the umbilical cord were identified as the segments of intestine that were absent in the fetus. Intestinal atresia combined with ectopia may be caused by local ischemia during temporary herniation and rotation of the fetal gut into the extraembryonic coelom. The close connection between ectopic intestine and amniotic sheath of the umbilical cord in this case may have facilitated vascularization and allowed development and viability of the ectopic intestine.
一只 2 岁的红色荷斯坦奶牛在妊娠 235 天时出现子宫扭转。通过剖腹产取出的胎儿生命体征微弱，腹部明显肿胀。与脐带相关的是一个水肿的袋状结构，其中包含具有蠕动活动的管状结构。由于预后不佳，母子均被安乐死。剖检时，胎儿的前胃、真胃和近端小肠严重膨胀；远端小肠、盲肠和近端结肠缺失；肠的两个盲端闭锁；远端结肠和直肠萎缩。与脐带相关的管状结构被确定为胎儿缺失的肠段。暂时性疝出和胎儿肠道旋转导致的局部缺血可能导致肠闭锁合并异位。本例中，异位肠与脐带羊膜鞘的紧密连接可能促进了血管生成，并使异位肠得以发育和存活。
