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ACCESSORIOULNAR (AU) arthrodesis (AU-AD) has been reported in dogs only once in the literature, to address accessory carpal bone (ACB) subluxation (Lenehan and Tarvin 1989). It is an infrequently performed procedure in British veterinary clinics. A request for such cases was made directly to 121 British veterinary surgeons accepting orthopaedic referrals and also published in Veterinary Record (Bush 2010); this generated five cases, although only three had sufficient clinical notes and radiographs to allow inclusion in the present report.
A detailed knowledge of carpal anatomy (Mikic and others 1992, Guilliard 2001) is crucial for the evaluation of carpal injuries and for surgical reconstruction. Due to the lack of published reports detailing feline carpal ligamentous anatomy, an assumption is made that the ligamentous structures of the ACB in cats are analogous to those of the dog (Voss and others 2003, Calvo and others 2009) (Fig 1).