Location of radiological lesions of the thoracolumbar column in French trotters with and without signs of back pain.

This research article discusses a study on French trotters (a breed of horse) where radiological scans of their thoracolumbar column were analysed to determine if there were any notable differences between horses that showed signs of back pain and those that did not. The study found out that horses showing signs of back pain exhibited a higher number of radiological lesions, implicating a strong correlation between back pain and the severity of such lesions.

Study Overview and Methodology

• The study involved analysing radiographs from 102 French trotters that showed signs of back pain and a control group of 16 French trotters that displayed no such symptoms.
• Data such as age, sex, race type, number of starts, earnings and performance index were documented to allow comprehensive comparison between the two groups.
• The radiological evaluation stretched from the 14th thoracic (T14) to the third lumbar (L3) vertebra, covering a significant portion of the spine.

Identified Lesions and Grading

• Lesions such as Impingement of Spinous Processes (ISP), Periarticular Proliferation of Synovial Intervertebral Articulations (PP-SIA), and Sclerosis of Synovial Intervertebral Articulations (S-SIA) were located and graded accordingly.
• The study revealed that 62% of horses from the control group and 96% of horses from the clinical group showed these radiological lesions.

Findings and Comparisons

• The number of affected horses, the number of radiological lesions per horse, and the average number of affected intervertebral spaces were significantly higher in the clinical group (horses with back pain).
• When examined for ISP, the number of impacted horses was not notably different between both groups. However, the number of affected interspinous spaces and the lesion grade were significantly higher in the clinical group.
• For PP-SIA, the number of affected horses, the number of affected SIA and the lesion grade were all significantly higher in the clinical group.
• In the case of S-SIA, the number of impacted horses and the affected SIA showed no significant differences between the two groups. But the grade of lesions was significantly higher in the clinical group.
• The study also noted that ISP was most frequently found between T15-T18, while PP-SIA and S-SIA were most common between T17-L2.
• Summarily, radiographic lesions were less severe and more localized in horses without back pain than in those with back pain.