Barreiro Vázquez, José DanielBarreiro Lois, AndrésMiranda Castañón, Marta Inés2020-10-282020-10-282020Barreiro-Vázquez, J.D.; Barreiro-Lois, A.; Miranda, M. Ultrasonography of Normal Adrenal Glands in Adult Holstein–Friesian Cows: A Pilot Study. Animals 2020, 10, 1171http://hdl.handle.net/10347/23468Ultrasonographic reference values for the adrenal glands of cattle have not been reported to date. Adrenal glands can be affected by different pathologies, such as hyperplasia, neoplasia and atrophy (either primary or secondary). The present findings indicate that the right adrenal gland can be easily characterized by transabdominal ultrasound in adult Holstein–Friesian cows, with no apparent influence of age or weight. The right adrenal gland (mean length 3.86 ± 1.39 cm; and mean thickness 1.39 ± 0.26 cm) was consistently and mainly located in the 12th intercostal space. The left adrenal gland was more difficult to locate due to its more medial position, and to the presence of gas in the gastrointestinal tract, so it could not be visualized in most animals (18/25). Its mean length was 3.72 ± 0.95 cm, and mean thickness was 1.36 ± 0.33 cm, in the sagittal section. This is the first report of the ultrasonographic appearance of the adrenal glands of cows and of the corresponding reference preliminary valueseng© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)Atribución 4.0 Internacionalhttp://creativecommons.org/licenses/by/4.0/Adrenal glandsAbdominal ultrasoundCowPhysiological statusjournal article10.3390/ani100711712076-2615open access