Monocephalus omphalopagus (tetrabrachius tetrapus) in a lamb

Document Type : Anatomy- Histology

Authors

1 Department of Basic sciences, Veterinary Faculty, Shahid Bahonar University of Kerman, Kerman, Iran

2 Department of Basic sciences, Vterinary Faculty, Shahid Bahonar University of Kerman, Kerman, Iran

3 Doctor of Veterinary Medicine, Kahnouj, Iran

Abstract

Caudal duplication is an abnormality which usually affects the digestive, urogenital and even respiratory systems. It forms a graded series from slight duplication to near separation of two fetuses caudocranially. In some conjoined twins, duplication process may cranially proceed up to the head region. This kind of developed conjoined monocephalus twin has been reported in many domestic species and is classified as thoracopagus or omphalopagus twins according to the presence of one or two hearts, respectively. A male dead conjoined monocephalus twin lamb attached from neck to thorax was used for this study. Lateral and dorso-ventral digital radiography and anatomic dissection were performed on the case. The results showed that duplication process of the gastrointestinal tract interestingly  prevented cranial to the midgut, while more cranial organs such as heart, lungs and even brain were seen duplicated. Duplication anomaly has been mostly reported cranially in cattle and caudally in sheep. Nevertheless, if duplication process does not occur completely, some body organs of the resulting conjoined twin will remain unduplicated. Duplication process of this case is thought to strengthen Spencer’s spherical theory.
 

Keywords

References

Abt, D.A., Croshaw, J.E., Hare, W.C.D. (1962) Monocephalus dipygus parasiticus and other anomalies in a calf. JAVMA. 141: 1068–1072.
Aine, M.S. (2009) Monocephalus dipygus parapagus: a suspected case of complete caudal duplication in a British Blue kitten. J Feline Med Surg. 11: 330-331.
Antoine, D., Murugavel, K., Alphonse, R.M.D., Ramalingam, S., Thandavamurthy, C. (1997) Monocephalus dipygus monster in a buffalo—a case report. Indian J Anim Reprod. 18: 166.
Bannykh, S.I., Bannykh, G.I., Mannino, FL., Jones, KL., Hansen, L., Benirschke, K., Masliah, E. (2001) Partial caudal duplication in a Newborn associated with meningomyelocele and complex heart anomaly. Teratology. 63: 94–99.
Buhari, S., Yakubu, A.S., Jibril, A., Adeyanju, J.B., Chafe, U.M. (2008) Monocephalus, thoracopagus and dipygus twins in Sokoto Red goat. Sokoto J Vet Sci. 7: 23-24.
Corbera, J.A., Arencibia, A., Morales, I., Gutierrez, C. (2005) Congenital duplication of the caudal region (monocephalus dipygus) in a kid goat. Anat Histol Embryol. 34: 61–63.
Dennis, SM. (1975) Embryonic duplications in sheep. Aust Vet J. 51: 83-87.
Doijode, SV., Thorat, N.H., Markandeya, N.M., Mamde, C.S. (1992) Monocephalus dipygus conjoined twin lamb. Indian J Anim Reprod. 13: 206.
Dominguez, R., Rott, J., Castillo, M., Pittaluga, R.R., Corriere, J.N. (1993) Caudal duplication syndrome. Am J Dis Child. 147: 1048-1052.
Hiraga, T., Dennis, S.M. (1993) Cogenital duplication. Vet Clin North Am-Food. 9: 145–161.
Kroes, HY., Takahashi, M., Zijlstra, R.J., Baert, J.A.L.L., Kooi, K.A., Hofstra, R.M.W., VanEssen, A.J. (2002) Two cases of the caudal duplication anomaly including a discordant monozygotic twin. Am J Med Genet. 112: 390–393.
Mitra, M., Basak, DN., Chakrabarti, A. (1994) Monocephalus thoracopagus tetrapus tetrabrachius monster in a Black Bengal goat. Indian Vet J. 71: 177-178.
Noden, DM., De Lahunta, A. (1985) Developmental mechanisms and malformations. In: The Embryology of Domestic Animals. Williams and Wilkins, (1st ed.) Baltimore, USA. p. 109-152.
Nottidge, H.O., Omobowale, T.O., Olopade, J.O., Oladiran, O.O., Ajala, O.O. (2007) A case of craniothoracopagus (monocephalus thoracopagus tetrabrachius) in a dog. Anat Histol Embryol. 36: 179–181.
Otiang’a-owiti, GE., Oduor-okelo, D., Kamau, G.K., Makori, N., Hendrickx, A.G. (1997) Morphology of a six-legged goat with duplication of the intestinal, lower urinary, and genital tracts. Anat Rec. 247: 432-438.
Shojaei, B., Kheirandish, R., Hasanzade, M. (2010) Monocephalus tetrapus dibrachius in a calf. Comp Clin Pathol. 19: 511–513.
Shojaei, B., Mohebbi, E., Hashemnia, Sh. (2012) Caudal duplication (monocephalus tripus dibrachius) in a kid goat. Eur J Anat. 16: 206-211.
Spencer, R. (2000) Theoretical and analytical embryology of conjoined twins: Part I, Embryogenesis. Clin Anat. 13: 36–53.
Sur, A., Kumar Sardar, S., Paria, A., (2013) Caudal duplication syndrome. J Clin Neonatol. 2: 101–102.
20. Tatsumi, N., Miki, R., Katsu, K., Yokouchi, Y. (2007) Neurturin-GFRα2 signaling controls liver bud migration along the ductus venosus in the chick embryo. Dev Biol. 307: 14–28.
Thakur, SB. (1988) Dipygus monstrosity in a calf. Indian Vet J. 65: 440.
Iranian Journal of Veterinary Medicine
Volume 10, Issue 2
April 2016
Pages 151-156

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