MEGAESÔFAGO CONGÊNITO EM CÃES E GATOS DE PEQUENO PORTE: CARACTERIZAÇÃO CLÍNICA, ABORDAGEM DIAGNÓSTICA E DESFECHOS TERAPÊUTICOS.

Congenital megaesophagus is a disorder characterized by esophageal dilation and hypomotility resulting from neuromuscular developmental abnormalities, usually manifesting in young animals. Although it is more commonly reported in medium- and large-breed dogs, an increasing number of cases has been identified in small-breed dogs and cats, highlighting the need for greater clinical awareness in this population. This study aims to characterize the main clinical features of congenital megaesophagus in small-breed dogs and cats, as well as to discuss diagnostic approaches and therapeutic outcomes described in Brazilian literature. This is a descriptive study based on a literature review of scientific articles, academic papers, and case reports published in Portuguese. The most frequent clinical signs include postprandial regurgitation, progressive weight loss, and aspiration pneumonia. Diagnosis is mainly based on imaging exams, especially contrast radiography. Treatment is predominantly conservative, focusing on dietary management and supportive care, with variable prognosis depending on disease severity and associated complications.