Vol. 10, Issue 4, Part F (2025)

Author(s): Ajit Kumar Singh, Sagar Chaudhary, MV Jithin, VK Varun and TK Sarkar

Abstract: Megacolon, a debilitating condition characterized by chronic colonic dilation and reduced motility is a significant cause of constipation in cats. This progressive disorder can be idiopathic or secondary to various factors leading to clinical signs such as infrequent defecation, tenesmus and abdominal distension. Early diagnosis is crucial for effective management and improved patient outcomes. This case-based study describes six feline cases (aged 2 to 7 years, including Persian and Indian native breeds) presented with chronic constipation, abdominal distension and tenesmus. Diagnosis was primarily based on lateral abdominal radiographs, utilizing a colon-to-fifth lumbar vertebra (L5) length ratio exceeding 1.5. All cases consistently showed marked colonic distension filled with compacted fecal matter with measured colon: L5 ratios ranging from 1.67 to 2.60 (mean 1.98±0.14) and no evidence of mechanical obstruction. These findings supported a diagnosis of idiopathic or functional megacolon. The study emphasizes the reliability of the colon and L5 ratio as an objective diagnostic marker and highlights the pivotal role of radiography in the timely recognition of feline megacolon facilitating prompt medical or surgical interventions leading to better clinical management.

DOI: 10.22271/veterinary.2025.v10.i7e.2430