Multiple congenital anomalies in a neonatal goat kid: Atresia ani, rectovaginal fistula, renal fusion, ectopic ureter and sinus of Valsalva aneurysm

Abstract

A 2‐week‐old female Anglo‐Nubian goat kid was presented with rectal malformation and signs of lower urinary and gastrointestinal dysfunction. Postmortem examination revealed multiple congenital anomalies including atresia ani with a rectovaginal fistula, right‐sided extramural ectopic ureter, renal fusion with unilateral severe pallor and fibrosis, and a right sinus of Valsalva aneurysm with duplicate right coronary ostia. The former two malformations likely facilitated ascending urinary tract infection, as microscopic findings included chronic right‐sided suppurative pyelonephritis and cystitis. While congenital rectal and urogenital anomalies are relatively common in goats, renal fusion and cardiac outflow tract malformations such as sinus of Valsalva aneurysm are exceedingly rare. This case demonstrates unique multifocal developmental anomalies in a small ruminant.