Gross lesions can include agenesis of the skin and musculature overlaying various areas of the skull and/or the spinal cord. There is also often a degree of nerual tissue loss associated with these lesions. Microscopic lesions can include fusion or deformation of the vertebrae. | Gross lesions can include agenesis of the skin and musculature overlaying various areas of the skull and/or the spinal cord. There is also often a degree of nerual tissue loss associated with these lesions. Microscopic lesions can include fusion or deformation of the vertebrae. |