Hematologic, Biochemical, and Endocrine Parameters in Horses With Tooth Resorption and Hypercementosis.

The research article explores the hematologic, biochemical, and endocrine parameters in horses suffering from a common condition in adult horses known as equine odontoclastic tooth resorption and hypercementosis (EOTRH). The research delineates the different parameters identified from the subject horses but highlights the need for further study due to its small sample size and absence of age-matched and management-matched control horses.

Study Objective and Methodology

• The primary aim of the research was to examine and report the hematologic, biochemical, and endocrine values in horses affected by EOTRH – a condition whose root cause is yet to be fully understood.
• In the study, a comprehensive blood count, biochemistry panel, and endocrine profile were conducted on horses, diagnosed with EOTRH via oral and radiographic examinations.
• The diagnosis was further confirmed through histopathological evaluations.
• The research sample consisted of 18 horses, aged between 10 to 32 years, suffering from EOTRH, across different regions of the U.S.

Study Findings

• Analysis of the complete blood cell count and chemistry panel for the subject horses revealed hypoalbuminemia (low albumin in the blood) was the only consistent abnormality. There were no significant abnormalities detected in thyroidal or pituitary pars intermedia function via endocrine parameters.
• The parathyroid hormone concentration was found to be heightened in 47% of 15 horses tested, and an elevated level of 25-hydroxy vitamin D was identified in 17% of the 17 horses tested.

Study Limitations and Further Research

• The study acknowledges its main limitations include a small sample size and the absence of age-matched and management-matched control horses.
• Due to these limitations, the significance of the elevated parathyroid hormone levels could not be determined.
• The study concludes indicating no clear hematological, biochemical, and endocrine changes due to EOTRH based on the small population evaluated.
• However, researchers emphasize the need for further evaluations, using signalment-matched controls, to further investigate trends identified in laboratory values.