Ultrasonographic findings of the thyroid gland in native dogs of Ahvaz district

Document Type : Research Paper

Authors

عضو هیات علمی

Abstract

    Ultrasonography is an imaging method which provides high resolution images for thyroid gland. It has a prominent role in evaluating morphologic changes of thyroid gland in small animal and humans. Based on our knowledge, there is no study in the Iran relating to ultrasonography of dog thyroid gland in literature. The aim of this study was finding of normal ultrasonographic images from thyroid gland in dog in July (warm), October (between warm and cold) and February (cold) months. The study was conducted on 12 native, adult healthy dogs (mean weight 18.5 kg). T3 and T4 hormones were measured by radioimmuno-assay before ultrasonography in all dogs.  Thyroid was scanned from caudal of larynx and in both sides of trachea. The total means (of both lobes in three months) length, width, height (mm) and volume (mm3) of both lobes were 24.2, 6.1, 4.2, 334.35, respectively. Dimensions of the each lob were slightly larger in February month. Although, the differences between dimensions and volume were not significant (p>0.05) during different months. In conclusion, the findings of this survey showed that the mean length, width, depth and volume of the left and right lobe of thyroid gland were in normal range in native dogs in Ahvaz district. Also, the temperature had not a significant influence on the size of thyroid gland between warm and cold months.

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