As the months and years move on, so does the research on ECVM. As you might expect, not everyone is in agreement.
The body of literature now includes papers from Sharon and also from other researchers who do not reach similar conclusions about the issues caused by this malformation. Below, I have included a list of journal papers and webinars, for reference if you wish to deepen your knowledge.
I am also including other resources for those who are interested.
Equus Soma
Equine Osteology & Anatomy Learning Center
Website sharing research on the equine skeletal system with particular focus on the pathologies that develop during the horse’s lifespan and correlate them with life history, breed, discipline and genetics. Extensive information and imagery on ECVM.
https://www.equus-soma.com/ecvm/
Veterinary Compendium
In October 2024, Dr. Kevin Haussler, DVM, DC, PhD (Veterinary Compendium) presented a 2-hr webinar on congenital vertebral anomalies including ECVM and related issues. In that webinar, he did a critical analysis of the existing research and explained what kind of differential diagnosis needs to be performed before declaring ECVM. He also blogged on the topic and hosted 2 virtual Community Gatherings that month – one with Dr. Christine Gee on differential diagnosis, the other with Dr. Veronika (Vroni) von Rohrscheidt (who is also a trainer) on the management of ECVM-diagnosed horses.
Webinar:
ECVM and Other Congenital Spinal Anomalies
Discussions:
ECVM – Some Management Approaches
ECVM – Differential Diagnosis
Published studies
In no particular order: the following peer reviewed journal articles address ECVM, as it is now known. Please remember when reading papers that no single paper proves one thing – a review of many papers and critical thinking about the study design, method and interpretation of results is always essential. Apologies for not having standardized the formatting, but all the links should be present.
- The Occurrence of a Congenital Malformation in the Sixth and Seventh Cervical Vertebrae Predominantly Observed in Thoroughbred Horses, May-Davis, Sharon, Journal of Equine Veterinary Science, Volume 34 , Issue 11 , 1313 – 1317
- Variations and implications of the gross morphology in the longus colli muscle in thoroughbred and thoroughbred derivative horses presenting with a congenital malformation of the Sixth and Seventh Cervical Vertebrae May-Davis, S, Walker, C. Journal of Equine Veterinary Science 35 (7), 560-568
- Characterization of the Caudal Ventral Tubercle in the Sixth Cervical Vertebra in Modern Equus ferus caballus. May-Davis, S., Dzingle, D, Saber, E., Blades Eckelbarger, P. Animals 13 (14), 2384
- Morphology of the Ventral Process of the Sixth Cervical Vertebra in Extinct and Extant Equus: Functional Implications, May-Davis, S., Hunter, R, White, R. Animals 13 (10), 1672
- Variations and Implications of the Gross Morphology in the Longus colli Muscle in Thoroughbred and Thoroughbred Derivative Horses Presenting With a Congenital Malformation of the Sixth and Seventh Cervical Vertebrae, May-Davis, Sharon et al., Journal of Equine Veterinary Science, Volume 35, Issue 7, 560 – 568
- Ex Vivo Computated Tomographic Evaluation of Morphology Variations in Equine Cervical Vertebrae, Veraa, S. et al, Veterinary Radiology & Ultrasound, Vol. 57, Issue 5
- Prevalence of Anatomical Variation of the Sixth Cervical Vertebra and Association with Vertebral Canal Stenosis and Articular Process Arthritis in the Horse, Spriet, M. and M Aleman, Veterinary Radiology & Ultrasound, Vol. 57, Issue 3
- Anatomical Variation of the Spinous and Transverse Processes in the Caudal Cervical Vertebrae and the First Thoracic Vertebra in Horses, Santinelli, I. et al, Equine Veterinary Journal, Vol. 48, 45–49
- Congenital variants of the ventral laminae of the sixth and seventh cervical vertebrae are not associated with clinical signs or other radiological abnormalities of the cervicothoracic region in Warmblood horses. Dyson S, Phillips K, Zheng S, Aleman M. Equine Veterinary Journal, 2025 Vol.2 :419-430
- Neck pain but not neurologic disease occurs more frequently in horses with transposition of the ventral lamina from C6 to C7. Henderson CS, Story MR, Nout-Lomas YS. J Am Vet Med Assoc. 2024 May 29;262(9):1215-1221