Author/Authors :
Helms, Alyssa B. Department of Large Animal Clinical Sciences - College of Veterinary Medicine - University of Tennessee, USA , Thompson, Riley E. Department of Large Animal Clinical Sciences - College of Veterinary Medicine - University of Tennessee, USA , Lawton, Sam Department of Large Animal Clinical Sciences - College of Veterinary Medicine - University of Tennessee, USA , Petersen, Jessica L. University of Nebraska-Lincoln, Lincoln, USA , Watson, Allison Department of Biomedical and Diagnostic Sciences - College of Veterinary Medicine - University of Tennessee, USA , Sula, Mee-Ja Department of Biomedical and Diagnostic Sciences - College of Veterinary Medicine - University of Tennessee, USA , Steffen, David University of Nebraska-Lincoln, Lincoln, USA , Whitlock, Brian K. Department of Large Animal Clinical Sciences - College of Veterinary Medicine - University of Tennessee, USA
Abstract :
A six-year-old multiparous Angus cow was presented for dystocia. Vaginal and rectal examinations revealed an approximately 360°
counterclockwise uterine torsion. The torsion was corrected by rolling the cow counterclockwise (three episodes) with the aid of a
plank coupled with manual detorsion via the vagina. The placement of obstetric chains followed by manual traction ultimately
delivered a stillborn male calf with evidence of vertebral aplasia, arthrogryposis, and abdominal organ herniation. Patient history
and subsequent parentage verification revealed that the calf was the result of a consanguineous (mother to son) mating. Tissue
samples from the affected calf and blood samples from the dam, sire, and ten half siblings were collected for genetic testing and
parentage verification. Necropsy, radiographic, and computed tomography examinations all supported a diagnosis of perosomus
elumbis. Perosomus elumbis is a congenital abnormality of unknown origin(s), and this is the first report of a case associated
with a consanguineous mating.
