title: Clinical characterisation of polydactyly in Maine Coon cats.
abstract: Objectives Polydactyly has been reported in a number of vertebrate species, including the domestic cat. It is a common characteristic in some breeding lines of the Maine Coon. The aim of this study was to assess the limb phenotype of polydactyl cats using physical and radiographic examinations. Methods We used physical examination and radiography to characterise the polydactyly phenotype in a cohort of 70 Maine Coon cats, including 48 polydactyl cats from four different breeding lines from Europe, Canada and the USA. Results The phenotypic expression of polydactyly showed great variability, not only in digit number and conformation, but also in the structure of the carpus and tarsus. Comparison of the size of the radius in polydactyl and non-polydactyl 3-month-old kittens and adult females did not reveal any difference between polydactyl and non-polydactyl cats. Conclusions and relevance We conclude that polydactyly in Maine Coon cats is characterised by broad phenotypic diversity. Polydactyly not only affects digit number and conformation, but also carpus and tarsus conformation, with no apparent deleterious consequence on feline welfare.
authors: 1 Paris East University, National Veterinary School of Alfort, Maisons-Alfort, and Faculty of Medicine, Créteil, France.
authors: Alexia
authors: A
authors: Hamelin
authors: 1 Paris East University, National Veterinary School of Alfort, Maisons-Alfort, and Faculty of Medicine, Créteil, France.|Current address: Veterinarius, Maisons-Alfort, France.
authors: Dominique
authors: D
authors: Begon
authors: 2 Unit of Anatomy, Imaging and Embryology, INP, National Veterinary School of Toulouse, University of Toulouse, Toulouse, France.
authors: Fabrice
authors: F
authors: Conchou
authors: 3 National Veterinary School of Nantes, Oniris, Atlanpole, La Chantrerie, Nantes, France.
authors: Marion
authors: M
authors: Fusellier
authors: 1 Paris East University, National Veterinary School of Alfort, Maisons-Alfort, and Faculty of Medicine, Créteil, France.|4 Inserm, IMRB U955-E10, Créteil, France.|5 French Establishment of Blood, Créteil, France.|6 APHP, University Hospital Henri Mondor, DHU Pepsy and Reference Centre for Neuromuscular Diseases GNMH, Créteil, France.
authors: Marie
authors: M
authors: Abitbol
mesh_terms: D000818:Animals; D001947:Breeding; D002371:Cat Diseases / Q000151:congenital* / Q000000981:diagnostic imaging / Q000235:genetics; D002415:Cats; D005260:Female; D005552:Forelimb / Q000002:abnormalities; D005602:France; D006614:Hindlimb / Q000002:abnormalities; D008297:Male; D010641:Phenotype; D017689:Polydactyly / Q000000981:diagnostic imaging / Q000662:veterinary*