Imperforate anus is a rare congenital condition of puppies and kittens in which the anal opening does not develop. Imperforate anus is the most common type of atresia ani (the congenital malformation resulting in the lack of a patent anus). Imperforate anus occurs more often in puppies than in kittens. The most common signs of an imperforate anus are the inability to defecate and the lack of an anal opening. There may be a bulge in the skin where the anal opening should be located. Other congenital malformations may also be seen in animals with imperforate anus.
Imperforate anus is usually diagnosed by physical examination. Further diagnostics such as radiographs may be performed to determine if the gastrointestinal and reproductive systems formed correctly.
Exam and diagnosis (sedation, radiographs, contrast media, etc.) may cost $200 to $400. Surgery may cost between $2000 and $3000 or more.
Post-operative recovery may take 2-4 weeks.
All newly born puppies and kittens should be monitored for normal defecation, straining to defecate, constipation, and fecal incontinence. After surgery, they should be closely monitored for post-operative infections.
Imperforate anus cannot be prevented. Affected animals should not be bred.
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