Segmental Hypoplasia of the Spinal Cord in a Japanese Black Calf

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  • IMAI Saki
    Department of Animal Science, School of Agriculture, Kyushu Tokai University
  • MORITOMO Yasuo
    Department of Animal Science, School of Agriculture, Kyushu Tokai University

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  • Anatomy: Segmental hypoplasia of the spinal cord in a Japanese Black calf

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Abstract

Segmental hypoplasia not associated with vertebral abnormalities was found in a Japanese Black calf that was unable to stand. Constriction occurred between the third and 5th segments of the lumbar spinal cord, and was most severe in the 4th segment. Myelodysplasia, such as hydromyelia and syringomyelia, absence or interruption of the central canal, dysplasia of the gray matter, and absence or divergence of the septal connective tissue at the dorsal median septum or the ventral median fissure, were confirmed histologically. These changes indicate hypoplasia of the segments affected following neural tube closure. Therefore, this case was suspected to be a closed neural tube defect.<br>

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