Dorsal scapular displacement (flying scapula) in a heifer

Abstract

AbstractDorsal scapular displacement, or flying scapula, is a rare condition characterised by sinking of the thorax between the forelimbs and protruding of the scapula above the thoracic vertebrae with the impression of a humpback appearance of the affected individual. The aetiology is still a matter of controversy. A 10‐month‐old heifer was presented with a history of sudden onset of gait abnormality and reluctance to stand and walk after being turned out to a spring pasture following the winter housing period. Clinical examinations revealed signs consistent with flying scapula. Whole‐blood selenium concentration and erythrocyte glutathione peroxidase activity were within the marginal status. Vitamin E level in serum was within the reference range. We proposed that the condition resulted from damage and bilateral rupture of the serratus ventralis muscle due to dystrophic myodegeneration in a selenium‐deficient individual exacerbated by walking long distances and unaccustomed physical activity after winter housing.