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Pilot study of head conformation changes over time in the Cavalier King Charles spaniel breed

Knowler, Susan Penelope, Gillstedt, Lena, Mitchell, Thomas J, Jovanovik, Jelena, Volk, Holger Andreas and Rusbridge, Clare (2019) Pilot study of head conformation changes over time in the Cavalier King Charles spaniel breed Veterinary Record, 184 (4).

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Abstract

Modern interpretation of head conformation in the Cavalier King Charles spaniel (CKCS) has favoured a smaller, more exaggerated, brachycephalic type than originally described in the 1929 breed standard. Recent research studies identified brachycephaly and reduced hind cranium as two conformational (dysmorphic) features that increase risk for symptomatic Chiari-like malformation and secondary syringomyelia (SM). A prospective pilot study investigated the hypothesis that dysmorphic head features could be assessed visually and correlated with risk of SM. Thirteen CKCS, selected from anonymised photographic evidence, were physically appraised by authorised Kennel Club judges using a head shape checklist. These subjective evaluations were then matched with objective measurements of the cranium (cephalic index and rostrocaudal doming) and their subsequent MRI. A positive correlation (P=0.039) between the judges’ checklist score and rostrocaudal doming (hindskull ratio) and a positive correlation between the cephalic index and hindskull ratio (P=0.042) were identified. Five CKCS had no SM and their status tallied with 62 per cent of the judges’ evaluation. Although the ability of adjudicators to identify differences in head conformation varied, there was sufficient association between the dysmorphic parameters and the risk of SM to cause concern and propose a larger study in CKCS breed.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Veterinary Medicine
Authors :
NameEmailORCID
Knowler, Susan Penelope
Gillstedt, Lena
Mitchell, Thomas J
Jovanovik, Jelena
Volk, Holger Andreas
Rusbridge, Clarec.rusbridge@surrey.ac.uk
Date : 11 January 2019
Funders : Swedish Kennel Club, Cavalier Matters Charity
DOI : 10.1136/vr.105135
Copyright Disclaimer : © British Veterinary Association 2019. Re-use permitted under CC BY-NC. No commercial re-use. Published by BMJ. This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, an indication of whether changes were made, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.
Depositing User : James Marshall
Date Deposited : 26 Jun 2020 10:55
Last Modified : 30 Jul 2020 10:14
URI: http://epubs.surrey.ac.uk/id/eprint/858072

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