The dysraphic levels of skin and vertebrae are different in mouse fetuses and neonates with myelomeningocele

Journal of Pediatric Surgery
Dorothea Stiefel, Martin Meuli

Abstract

Mouse fetuses with spontaneous myelomeningocele (MMC) were investigated, determining the various levels of dysraphism in soft tissue, spinal cord, and vertebrae. Morphology was correlated with hind limb function. Viable curly tail/loop tail mouse fetuses underwent qualitative standardized ex utero examination of tail and hind limb sensitivity and motor response. Afterward, they were processed either for histology or skeletal preparation. All animals displayed identical cranial levels of soft tissue and neural defects. The cranial opening of the vertebral defects were invariably located more cranially (range, 0.5-5 vertebrae; mean = 2.25). The caudal opening of soft/neural tissue and bony defects was invariably at the coccygeal base. The comparison of functional with morphological levels demonstrated that, in 52.5%, the level of the soft/neural tissue dysraphism and, in 47.5%, the level of the bony opening correlated with the neurologic deficit. The naturally occurring soft tissue coverage over the MMC could exert a protective effect toward the underlying spinal cord. This interpretation supports the concept that in utero acquired destruction of exposed neural tissue is a main factor for the neonatal functional deficit. Thus, th...Continue Reading

References

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Dec 16, 1998·Lancet·N S AdzickA W Flake
May 1, 2007·Journal of Neurosurgery·Dorothea StiefelMartin Meuli

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Citations

Dec 17, 2014·Brain Research·George M Smith, Barbara Krynska
Apr 14, 2017·Journal of Gynecology Obstetrics and Human Reproduction·L MatuszewskiO Morel

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