Diagnostic aspects of equine laryngeal hemiplegia: a case report

Laryngeal hemiplegia, commonly known as roaring, is a condition of varying etiology by neuropathy of the recurrent laryngeal nerve. The hallmark clinical sign is an inspiratory noise, which may be associated with exercise intolerance and dyspnea. Diagnosis is typically confirmed through imaging tests, such as endoscopy, wle the differential diagnosis includes laryngeal dysplasia, a condition presenting with similar clinical signs and confirmed via ultrasonography. This report describes the case of right laryngeal hemiplegia in a horse and the subsequent differential diagnosis process. Endoscopic examination revealed significant asymmetric in the movement of the right laryngeal cartilage, confirming the diagnosis of laryngeal hemiplegia. Ultrasound of the right ventral proximal cervical region showed correct positioning of the dorsal cricoarytenoid muscle, ruling out was correctly positioned, ruling out the misalignment characteristic of laryngeal dysplasia. Based on these findings, we concluded that this case represented laryngeal hemiplegia.