Mazzullo G, Monteverde V, Macrì F, Partanna S, Caracappa S
Istituto Zooprofilattico Sperimentale A. Mirri della Sicilia, Via Gino Marinuzzi, 3-90129, Palermo, Italy.
J Small Anim Pract. 2007 Jul;48(7):410-3. doi: 10.1111/j.1748-5827.2006.00291.x. Epub 2007 May 8.
Caudal duplication is a rare type of conjoined twinning. The aim of this case report is to describe a case of caudal duplication in a male crossbreed puppy. The puppy was macroscopically and radiographically examined after death. External features included a supernumerary limb projecting from the perineum, complete lack of tail, anal atresia, double penis and absence of scrotal sacs. Internal examination showed anomalies involving the intestine and the urinary system. At x-ray examination, the supernumerary limb showed features similar to that of the normal right hindlimb but showed absence of fibula and tibia and presence of three metatarsi and phalanges. The authors discuss the pathogenic mechanisms of this condition, infrequently reported in veterinary practice, pointing out the importance of embryonic duplications commonly associated with dystocia.
尾部重复畸形是连体双胎的一种罕见类型。本病例报告的目的是描述一只雄性杂交幼犬的尾部重复畸形病例。幼犬死后进行了大体和放射学检查。外部特征包括从会阴突出的多余肢体、完全无尾、肛门闭锁、双阴茎和阴囊缺失。内部检查显示肠道和泌尿系统存在异常。在X线检查中，多余肢体显示出与正常右后肢相似的特征，但腓骨和胫骨缺失，有三个跗骨和趾骨。作者讨论了这种在兽医实践中很少报道的病症的致病机制，指出了通常与难产相关的胚胎重复畸形的重要性。
