Studies by Washabau, et al. have shown that in naturally occurring cases of feline megacolon, sections of longitudinal and circular smooth muscle of all parts of. Constipation is defined as the infrequent or difficult evacuation of stool. It is a common problem in cats, may be acute or chronic and does not. Megacolon occurs more frequently in cats than dogs and is usually seen in middle-aged to geriatric cats. The ascending, transverse, and.

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The diagnosis of constipation and megacolon are usually based on the history as well as results of a physical examination, including a complete neurological exam. An X-ray is helpful in diagnosing an obstruction so have your pet examined The resulting disease has diffuse colonic dilatation and hypomotility. The stimulant laxatives enhance propulsive motility by a variety of actions. If the cat does not respond to this treatment, other laxatives may be tried. Megacllon and Footpad Diseases.

In this group of cats, it is not yet clear whether this disorder represents a primary or secondary resulting from long-standing constipation and colonic distension abnormality.

Megacolon and Constipation in Cats

These findings were associated with decreased myosin light-chain phosphorylation, suggesting a disturbance of intracellular calcium mobilization 2 and signifying that feline idiopathic megacolon is a generalized dysfunction of colonic smooth muscle. The cat may defecate outside of the litter box. Let other pet parents know what you think. Constipation, obstipation and megacolon may be seen in cats of any age, breed and gender, however middle aged mean 5.


Hypertrophic megacolon is a result of pelvic fracture malunion and stenosis of the pelvic canal or another obstructive mechanism including neoplasm, polyp, or foreign body. For cats with abnormal narrowing of the pelvis, surgery can be performed to make the pelvic opening wider.

Conditions of the Lens. A colectomy, or removal of the colon is performed. Post-operatively, diarrhea will be present for weeks. Mineral oil ml PO q24h or petrolatum hairball remedies, ml PO q24h are best suited to mild cases of constipation.

Surgery Cats with chronic obstipation or megacolon should be considered as candidates for colectomy. Unlike humans with megacolon, in cats there is no evidence to show any deficiency in enteric neuronal network.

The histamine H 2 antagonists ranitidine Zantac, GlaxoSmithKline and nizatidine Axid, Eli Lilly stimulate in vitro feline colonic smooth muscle contraction via inhibition of tissue acetylcholinesterase, but in vivo studies still need to be conducted to determine whether these medications should be considered a standard component of therapy for idiopathic megacolon.

How long does it take lily plant poisoning to get out of a cats system? Colonic impaction is the accumulation of hardened feces in the pelvic colon and is the consequence of constipation, obstipation or megacolon. Why Do Dogs Bark. Balancing the Gut Flora. NaCl and Blood Pressure. Many cats with mild to moderate constipation respond to conservative medical management e. Because iatrogenic hypothyroidism may be associated with constipation, measurement of basal serum thyroxine concentration is recommended in cats with recurrent constipation after treatment of hyperthyroidism.


Clinical signs commonly include anorexia, weight loss, vomiting, and dyschezia; physical examination classically reveals a large amount of very firm feces palpable within the colon. Profound colonic impaction is a consistent physical examination finding in cats with idiopathic megacolon.

A megacolkn diagnostic investigation is needed to eliminate other potential causes from the list of diagnostic differentials. Studies by Washabau, et al. The patient should be fed a low-residue diet until 12 hours before induction of general anesthesia, at which time food should be withheld. Chronic fecal impaction results in mucosal ulceration and inflammation and risk of perforation.

Feline Megacolon – WSAVA Congress – VIN

Vomition is frequently associated with straining. Many surgical techniques for the management of feline idiopathic megacolon have been described, including coloplasty and partial or subtotal colectomy. Radiology of Abdominal Trauma. Celine distinction is critical in considering treatment plans as well as prognosis.

Clinical Diagnosis for Rabies.

Pathogenesis, diagnosis, and therapy of feline idiopathic megacolon.

Treatment of Bleeding Disorders. There was no difference in the overall recurrence of constipation in either group.

Therefore, a thorough evaluation should include a complete blood count, feeline biochemical profile, and urinalysis. Many cats diagnosed with megacolon do not respond adequately, and surgery is the only option.