SPP1 and idiopathic scoliosis: Moreau and colleagues report that blood tests could be useful markers for the diagnosis of idiopathic scoliosis and the prognosis of curve progression: a functional scoliosis test [66-70], further refined recently using a more accurate technology called cellular dielectric spectroscopy [71]; and a biochemical scoliosis test using raised plasma OPN and lower sCD44 values.