Glossopharyngeal and vagus neuropathy associated to stylopharyngeus muscle compression in horse guttural pouch – case report

  • Juliana de Moura Alonso Universidade Estadual Paulista “Júlio de Mesquita Filho”, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia e Anestesiologia Veterinária
  • Carlos Alberto Hussni Universidade Estadual Paulista “Júlio de Mesquita Filho”, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia e Anestesiologia Veterinária
  • Marcos Jun Watanabe Universidade Estadual Paulista “Júlio de Mesquita Filho”, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia e Anestesiologia Veterinária
  • Ana Liz Garcia Alves Universidade Estadual Paulista “Júlio de Mesquita Filho”, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia e Anestesiologia Veterinária
  • Marília Ferrari Marsiglia Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia
  • Celso Antônio Rodrigues Universidade Estadual Paulista “Júlio de Mesquita Filho”, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia e Anestesiologia Veterinária https://orcid.org/0000-0002-4837-463X
Keywords: Dysphagia, Dyspnea, Equine, Nasopharyngeal collapse

Abstract

Neuropathies of pharyngeal branches of glossopharyngeal and vagus are often associated with guttural pouches diseases; however, these branches of injury due to stylopharyngeus muscle compression are not reported. A case was reported of a quarter horse mare, 8 years old, 450 kg, presenting dyspnea and respiratory noise associated with weight loss. Clinical examination observed mixed dyspnea, tachycardia, dysphagia, sialorrhea, lung crackles and submandibular and parotid lymphadenopathy. Endoscopic exam showed right arytenoid chondritis, nasopharyngeal collapse, generalized larynx edema and dorsal displacement of the soft palate. Right guttural pouch evaluation showed swelling in the origin of stylopharyngeus muscle with consequent compression of the XII, X and IX cranial nerves. Tracheotomy, systemic treatment with corticosteroids, beta lactams and aminoglycosides antibiotics were performed. No resolution was observed and, after 16 days, the animal showed clinical worsening, developed pleuropneumonia, uveitis, severe sepsis, acute renal failure and was euthanized. The mixed neuropathy resulted in rapid clinical deterioration of the animal, due to the difficulty in swallowing and consequent associated respiratory processes. This report emphasizes the importance of evaluating stylopharyngeus muscle origin in cases of nasopharyngeal collapse associated with dysphagia in horses, given the possibility that structural changes in this muscle can result in laryngeal neuropathy.

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Published
2019-07-01
How to Cite
Alonso, J., Hussni, C., Watanabe, M., Alves, A. L., Marsiglia, M., & Rodrigues, C. (2019). Glossopharyngeal and vagus neuropathy associated to stylopharyngeus muscle compression in horse guttural pouch – case report. Brazilian Journal of Veterinary Research and Animal Science, 56(1), e146549. https://doi.org/10.11606/issn.1678-4456.bjvras.2019.146549
Section
CASE REPORT