Large Colon Volvulus in a Neonatal Foal Secondary to Atresia Coli.

An 18 hours old foal presented with a suspected meconium impaction. There was no response to treatment and a tentative diagnosis of atresia coli (AC) was made. Surgical intervention was declined and the foal was euthanized 12 hours after admission. Type 3 AC was confirmed on post-mortem examination, with the colon ending at the left ventral colon. A 1,080 large colon volvulus (LCV) at the sternal flexure was present. It is speculated that AC could predispose the foal to LCV. Histopathology was not performed but would be useful in further cases of AC.