A case of polydactylic polymelia with an extra pelvic limb attached at the left pelvic region in a fowl

Kim, Chong-sup; Won, Chung-kil; Ha, Jeung-key; Yeon, Seong-chan

Korean Journal of Veterinary Research 2001;41(1):7-11.

Chong-sup Kim¹, Chung-kil Won², Jeung-key Ha³, Seong-chan Yeon¹

¹Institute of Animals Medicine, College of Veterinary Medicine Gyeongsang National University
²College of Medicine, Korea University
³Division of Animal Science, College of Agriculture, Gyeongsang National University

발가락과다증(polydactyly)인 1개의 여분의 뒷다리가 왼쪽 둔부위에 부착된 닭의 다리과다증(polymelia) 1례

김종섭¹, 원청길², 하정기³, 연성찬¹

¹경상대학교 수의과대학 동물의학연구소
²고려대학교 의과대학
³경상대학교 농과대학 축산학부

Abstract

The abnormal female fowl (Arbor Acres broiler) of 40-day-old, which was polymelia with polydactyly was observed macroscopically and radiographically. An extra pelvic limb was attached at the left pelvic region. The extra pelvic limb consisted of an underdeveloped and malformed Os coxae like bone, femur like bone, tibia and fibula like bones, tarsal and metatarsal like bones, and five digits. The tarsal bones of two normal pelvic limbs and one extra pelvic limb were not fused with tibia and metatarsal bones respectively. The metatarsus of extra pelvic limb consisted of a single bone derived from several components. In a case of normal, first metatarsal bone remains independent. However in this case. all of metatarsal bones were fused. The extra pelvic limb was polydactyly. The digits consisted of the first and extra digit of three. the second and third of four. and the fourth of five phalanges. In each toe the last phalanx was pointed and formed the claw. The first and the second digits were polyphalangia [hyperphalangia]. The extra digit was microdactylia and brachydactyly.

Key Words: Fowl, polymelia, polydactyly, microdactylia, brachydacyly