Anatomical development of testicles in dogs and clinical implications of cryptorchidism
DOI:
https://doi.org/10.33448/rsd-v13i6.46024Keywords:
Anatomy; Congenital anomaly; Dog; Testicular descent.Abstract
The testicle of the dog is an oval reproductive gland located in the scrotum, responsible for the production of sperm and sex hormones, such as testosterone. However, in some situations, there is a failure in the descent of one or both testicles into the scrotum during embryonic and fetal development or shortly after birth, characterizing cryptorchidism, which is one of the most common congenital anomalies in dogs. This condition has significant implications for the reproductive health and well-being of affected dogs, as well as presenting challenges for breeding and selection of breeders. Based on this, this work aims to describe the anatomy of the dog's testicle and its development, as well as present the anatomical changes associated with cryptorchidism and the clinical implications of this condition for the health of these animals, through a literature review. Understanding the normal anatomy of the male reproductive system and the changes associated with cryptorchidism is essential for proper diagnosis, management, and genetic counseling. The etiology of cryptorchidism in dogs is multifactorial, involving genetic and environmental components. Additionally, endocrine disorders, maternal factors, exposure to endocrine disruptors, and other environmental influences during gestation can also contribute to the occurrence of this anomaly, which is as frequent as it is concerning in the care of dogs.
References
Almeida, I. D. (2021). Metodologia do trabalho científico. Recife: Ed. UFPE.
Amann, R. P., & Veeramachaneni, D. N. R. (2007). Cryptorchidism in common eutherian mammals. Reproduction, 133(3), 541–561. https://doi.org/10.1530/rep-06-0272
Arteaga, M. B., Valle, F. G., Martin, F. C. Carballo, P. C. & Molina, A. G. (2000) Morphologic and endocrinologic charcteristics of retained canine testes. Canine Practice. 25, 3, 12-15. Disponível em: https://www.cabidigitallibrary.org/doi/full/10.5555/20002213803
Ballaben, N. M. R., Alves, M. A. M. K., & Moraes, P. C. (2016). Torção Testicular Intra-Abdominal Em Cão Criptorquida. Revista Investigação, 15(4). https://doi.org/10.26843/investigacao.v15i4.1262
Bertoldi, J., Friolani, M., & Ferioli, R. (2015). Sertolioma em cão associado a criptoquidismo bilateral - Relato de Caso. Faculdade de ensino superior e formação integral. Disponível em: https://pesquisa.bvsalud.org/portal/resource/pt/vti-16115
Birchard, S. J., & Nappier, M. (2008). Cryptorchidism. Compendium: Continuing Education for Veterinarians (Yardley, PA), 30(6), 325–337. Disponível em: https://pubmed.ncbi.nlm.nih.gov/18690608/
Budras, K. D., McCarthy, P.H., Fricke, W., Richter, R., Horowitz, A. & Berg, R. (2007). Anatomy of the Dog: An Illustration Text, (5th) Revised Edition. Schlütersche.
Corria, L. A. M., Goldschmidt, B., Carvalho, E. C. Q., &, Moura, V. L. S. (2003). Análise citogenética de cães criptorquidas. Revista Brasileira de Ciência Veterinária, 10(3), 136-138. http://dx.doi.org/10.4322/rbcv.2015.288
Cruz, T. P. M. (2016). Estudo retrospectivo de orquiectomia em cães e gatos atendidos em hospital veterinário escola no período de cinco anos (Tese de conclusão de curso). Universidade Federal da Bahia, Salvador, Brasil.
Cunningham, J. G. (2004). Tratado de Fisiologia Veterinária, (3ª Ed). Guanabara.
De Sousa Arruda, G. A., Honorato, R. A., Santos, F. R., Oriente, V. N., Morais, A. M. L., Venuto, A. M., Albuquerque, V. Q., Mouta, A. N., Fonseca, A. D. V., & Vianam G. A. (2009) Seminoma em um cão com hérnia inguinal e testículo ectópico (relato de caso), Disponível em: http://dx.doi.org/10.33448/rsd-v11i4.27269
Domingos, T. C. S., & Salomão, M. C. (2011). Meios de diagnóstico das principais afecções testiculares em cães: revisão de literatura. Revista Brasileira de Reprodução Animal, 35(4), 393-399. Disponível em: http://www.cbra.org.br/pages/publicacoes/rbra/v35n4/pag393-399.pdf
Domingues, S. B. (2009). Patologia prostática em canídeos: prevalência, sintomatologia e tratamento. Dissertação de Mestrado. Universidade Técnica de Lisboa, Faculdade de Medicina Veterinária, Lisboa.
Dyce , K. M., Sack, W. O., & Wensing, C. J. G. (2019). Tratado de anatomia veterinária. (5ª ed). Rio de Janeiro: Elsevier.
Dyce, K. M. (2010). Tratado de anatomia veterinária. (4ª ed). Rio de Janeiro: Elsevier.
Ettinger, S. J., Feldman, E., & Côté. (2023). Tratado de medicina interna veterinária – Doenças do cão e do gato. (8ª ed). Guanabara Koogan.
Evans, H. E. & Lahunta. A. (2019). Miller's Anatomy of the Dog (4ªEd.) St. Louis: Elsevier Health Sciences.
Feitosa, F. L. F. (2014). Semiologia veterinária: a arte do diagnóstico. (3ªEd). Rio de Janeiro: Roca
Fossum, T. W. (2021). Cirurgia de pequenos animais. Elsevier.
Foster, R. A. (2012). Common Lesions in the Male Reproductive Tract of Cats and Dogs. Veterinary Clinics of North America - Small Animal Practice, 42, 527–545, https://doi.org/10.1016/j.cvsm.2012.01.007
Hutson, J. M., Li, R., Southwell, B. R., Petersen, B. L., Thorup, J., & Cortes, D. (2013). Germ cell development in the postnatal testis: the key to prevent malignancy in cryptorchidism?. Frontiers in endocrinology, 3, 176. https://doi.org/10.3389/fendo.2012.00176
James, R. W., & Heywood, R. (1979). Age-related variations in the testes and prostate of beagle dogs. Toxicology, 12(3), 273–279. https://doi.org/10.1016/0300-483x(79)90073-8
Jericó, M. M., Andrade Neto, J. P & Kogika, M. M. (2023). Tratado de medicina interna de cães e gatos. Guanabara Koogan.
Johnston, S. D., Kustritz, M. V. R & Olson, P. N. S. (2001) Disorders of canine testes and epididymes. Em S. D. Johnston (Ed.) Canine and Feline Theriogenology (pp. 312-332).
Junqueira, L. C., & Carneiro, J. (2011) Histologia básica. (11ªed). Rio de Janeiro: Guanabara Koogan.
Kawakami, E., Tsutsio, T. Saito, S. Kakimoto, T., & Osaga, A. (1999) Changes in peripheral plasma luteinizing hormone and testosterone concentrations and semn quality in normal and cryptorchidism in dogs. Journal of Veterinary Medical Science, 61, 10, 1107-1111.
Klonisch, T., Fowler, P. A. & Hombach-Klonisch, S. (2004). Molecular and genetic regulation of testis descent external genitalia development. Biologia do Desenvolvimento, 270 (1), 1-18. https://doi.org/10.1016/j.ydbio.2004.02.018.
Konig, H. E., & Liebich, H. G. (2004) Anatomia dos animais domésticos: texto e atlas colorido. (1ªed). Porto Alegre: ARTMED.
Liao, A. T.; Chu, P. Y.; Yeh, L. S.; Lin, C. T.; Liu, C. H. (2009) A 12-year retrospective study of canine testicular tumors. Theriogenology, Los Altos, 71, 7, 919- 923. https://doi.org/10.1292/jvms.71.919.
Mattos, P. C. (2015). Tipos de revisão de literatura. Unesp, 1-9. Disponível em: https://www.fca.unesp.br/Home/Biblioteca/tipos-de-evisao-de-literatura.pdf
Melo, F. O. (2018). Estudo retrospectivo da casuística de criptorquidismo em cães e equinos no hospital veterinário no período de 2015 a 2018. (Trabalho de conclusão de curso). Universidade Federal da Paraíba, Paraíba, Brasil.
Memon, M. & Tibary, A. (2001). Canine and Feline Cryptorchidism. In Concannon P. et al (Ed.), Recent Advances in Small Animal Reproduction, International Veterinary Information Service.
Nascimento, E. F. & Santos, R. L. (1997). Patologia da reprodução dos animais domésticos. Guanabara Koogan.
Oliveira, A. L. A. (2022). Cirurgia em pequenos animais. Manole.
Pendergrass, T. W., & Hays, H. M., (1975). Cryptorchidism and related defects in dogs: Epidemiologic comparison with man. Teratology, 12, 1, 51-56, 1975. https://doi.org/ 10.1002/tera.1420120107.
Pereira A. S. et al. (2018). Metodologia da pesquisa científica. [free e-book]. Santa Maria/RS. Ed. UAB/NTE/UFSM.
Prodanov, C. C. & Freitas, E. C. (2013). Metodologia do trabalho científico: Métodos e Técnicas da Pesquisa e do Trabalho Acadêmico. 2ed. Ed. Feevale.
Reis, E. L. A. (2021). Criptorquidismo em cães (Trabalho de conclusão de curso). Centro Universitário do Sul de Minas, Minas Gerais, Brasil.
Romagnoli, S. E. (1991) Canine cryptorchidism. Veterinary Clinics of North America: Small Animal Practice, 21, 3, 533-544. https://doi.org/10.1016/s0195-5616(91)50059-0.
Rother, E. T. (2007). Revisão sistemática x revisão narrativa. Acta paulista de enfermagem, 20 (2). https://doi.org/10.1590/S0103-21002007000200001.
Schiabel, M. D. (2018) Avaliação das principais lesões testiculares de cães sem raça definida na região de Uberlândia-MG. (Trabalho de Conclusão de Curso), Universidade Federal de Uberlândia, 47p.
Singh, B. (2019) Tratado de Anatomia Veterinária. Rio de Janeiro: Grupo GEN.
Vertegen, J. (1998) Conditions of the male. In: Simpson, G. England, G., Harvey, M. Manual of small Animal Reproduction and Neonatology. Cheltenham: BSAVA, Cap 7, p.71-82.
Yates, D., Hayes, G., Hefferman, M. & Beynon, R. (2003) Incidence of cryptorchidism in dogs and cats. Veterinary Record, 152, 16, 502- 504. https://doi.org/10.1136/vr.152.16.502.
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Copyright (c) 2024 Gabriele Barros Mothé; João Victor Narciso da Silva; Juliana Câncio Batista; Maria Gabriela Lima da Cunha; Jéssica Carvalho do Nascimento; Giovanna Garcia Bastos; Luize Lopes Alves Moreira; Rafael Ribeiro Pereira; Roberta Gomes Linhares; Aguinaldo Francisco Mendes Junior
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