Luxation of the cervical spinal column as a cause of wobbles in a foal.

This research discusses a case of spinal unsteadiness, or ataxia, in a 3-month-old foal caused by a protrusion in the 3rd cervical vertebra. The cause could not be precisely diagnosed, but was hypothesized to be congenital or incurred from an early trauma. The affected region showed severe tissue softening, reactive cell proliferation, and fibrosis. This case demonstrated clinical symptoms and pathological findings similar to “wobbles”, a documented disease in horses.

Background

• The study is centered around a clinical case of a 3-month-old colt portraying ataxia, or general unsteadiness, which is usually a sign of an underlying medical condition. The researchers observe a protrusion into the vertebral canal of the body of the 3rd cervical vertebra which they suggest to be the cause of the ataxia.

Observations

• The research observes that the linked vertebrae, specifically C3 and C4, were immovably joined in a manner that the protrusive deformity was unable to be rectified through an extension of the spinal column at this particular point. This nature of the deformity resulted in the compression of the colt’s spinal cord.
• However, the researchers were unable to definitively ascertain the cause of this spinal luxation or dislocation which resulted in the vertebral protrusion. It was postulated that it could either be a congenital deformity or a result of early stage trauma to the colt, likely inflicted unintentionally by the dam or during frolicking with other foals.
• Furthermore, the researchers note that the clinical symptoms only became apparent when a significant narrowing of the vertebral canal had manifested as a result of normal skeletal growth.
• The foal in the study also exhibited severe malacia at the point of spinal cord compression. Malacia refers to a pathological softening of tissues, making them more susceptible to damage.
• The pathological examination showed marked gliosis, denoting a reactive response of neural cells to damage in the central nervous system, and perivascular fibrosis which involves the excessive depositing of fibrous connective tissue. These findings pose significant implications on understanding the progression of the condition.

Conclusion

• This study concluded that both the clinical manifestation of ataxia and the pathological findings were largely consistent with the features of a common equine neurological disease known as ‘wobbles’ which is recognized primarily in the United States and some other countries.
• The research presents an interesting comparison between the clinical presentation and pathological features of the colt’s condition with the well-documented equine disorder, potentially providing valuable insights to veterinary clinicians dealing with such cases.