hich the brain stem and cervical spinal cord exit. When you have achondroplasia the foramen magnum is compressing the brain stem and spinal cord. Symptoms of narrowing include apnea the cessation of breathing and cervical myleopathy. C-T scans and MRI scans are done to examine the size of the infectious foramen magnum. A neurosurgical procedure called a foramen magnum decompression is executed to alarge foramen and alleviate further symptoms. Adolescents are at risk of getting lumbosacral spinal stenosis. The lumber spinal cord or nerve roots become compressed producing nerosurgical symptoms. Initial symptoms including weakness, tingling, and pain of the legs. Pain usually alleviated by assuming a squatting position. When condition worsens, pain in lower buttocks occurs. Diagnosis made by neurosurgical procedure called a lumber laminectomy. Dwarfism is an autosomal dominant condition. This means a person with achondroplasia has a 50% chance of passing it to his children. 75% of individuals with achondroplasia are born to normal size parents. The gene for Dwarfism, fibroblast growth factor receptor 3 (FGFR3) is acquired when one undersized individual and a normal sized individual produce a child. Couples at risk of having a child with 2 copies of the changed gene. A DNA test is now also available to detect double homozygosity....
