Tokudome K, Ito S, Kato T, Yanase T, Kawarasaki T, Moritomo Y. Segmental spinal dysgenesis with caudal agenesis in a Holstein calf.
J Vet Med Sci 2016;
79:277-281. [PMID:
27980290 PMCID:
PMC5326931 DOI:
10.1292/jvms.16-0462]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A rare complex dysraphic malformation, comprising segmental spinal dysgenesis with caudal
agenesis, was found in a Holstein calf that was unable to stand and was slightly short at
the lumbosacral spine with taillessness. The thoracolumbar and sacrococcygeal regions of
the midline axial segments showed severe deformities. In the spinal cord, the
thoracolumbar region showed severe constriction with myelodysplastic changes, and the
sacrococcygeal region showed dorsoventral separation with connection to a neural mass. In
the spine, vertebral anomalies according to the degree of the segmentation error were
confirmed. The cervical and thoracic segments also showed milder dysraphic changes. These
changes suggest a multisegmental causal insult impairing the early embryonic notochord.
This represents the first bovine case definitively confirmed morphologically.
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