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Atresia ani in dogs
Large animal practitioners see this congenital anomaly sometimes in piglets. In dogs, atresia ani is very rare. This interesting retrospective study gives interesting informations concerning this problem in dogs. Did you know that females are overrepresented and that especially toy poodles and Boston terriers belong to the breeds at risk?

Congenital anomalies of the rectum and anus are rare in dogs. The most frequently reported anomaly is atresia ani.

Four types of atresia ani have been reported, including congenital anal stenosis (Type I); imperforate anus alone (Type II) or combined with more cranial termination of the rectum as a blind pouch (Type III); and discontinuity of the proximal rectum with normal anal and terminal rectal development (Type IV).

An increased incidence was found in females and in several breeds, including miniature or toy poodles and Boston terriers.

Surgical repair is the treatment of choice, but postoperative complications can occur, including fecal incontinence and colonic atony secondary to prolonged preoperative distension.



Source: Maria L. Vianna, Karen M. Tobias (2005): Atresia Ani in the Dog: A Retrospective Study. In: Journal of the American Animal Hospital Association 41:317-322 (2005)



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SMALL ANIMAL PRACTICE

Electroretinography as a prognostic indicator after retinal reattachment surgery
Retinal detachment is one of the ophthalmological emergencies, and even if the diagnosis is made early and a reattachment surgery is performed immediately many dogs do not regain postoperative vision. This 18‐month prospective study recorded signalment, duration, cause, and extent of retinal detachment and pre‐operative vision status. Rod and mixed rod‐cone ERG responses were recorded prior to RRS. Referring veterinary ophthalmologists assessed vision 2 months postoperatively to determine whether pre‐operative electroretinography (ERG) predicts postoperative vision in dogs undergoing retinal reattachment surgery (RRS).

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