Osborne J C, Troutt H F
Cornell Vet. 1977 Apr;67(2):222-8.
A case of an unusually large congenital pulmonary malformation (hamartoma) in a seven-month-old aborted Holstein fetus is reported. This was the dam's sixth gestation; the previous five had terminated in November or early December with delivery of a normal, live calf. Abortion was spontaneous without prior clinical signs noted by the herdsman. The condition of the aborted fetus indicated abortion followed closely intrauterine fetal death, which probably resulted from vascular insufficiency owing to crowding in the fetal thorax by the massive pulmonary malformation.
报道了一例七个月大流产的荷斯坦胎儿患有异常大的先天性肺畸形（错构瘤）的病例。这是该母牛的第六次妊娠；前五次妊娠于11月或12月初结束，产下正常的活犊牛。流产是自发的，牧民未注意到先前有临床症状。流产胎儿的情况表明，流产是在宫内胎儿死亡后不久发生的，这可能是由于巨大的肺畸形导致胎儿胸腔拥挤，引起血管供血不足所致。
