The Boston Terrier Club Of America
www.bostonterrierclubofamerica.org › bostonHemivertebrae. Boston Terriers can be prone to "hemivertebrae". Hemivertebrae are vertebrae that are shaped more like triangles than blocks. A more serious problem known as spina bifida involves deformities to the caudal aspect of the spinal column. The significance of these lesions can be from mild to severe.