Can a 70 degree thoracic be diagnosed as a postural kyphosis to someone at the age of 23 ? not involving other types of kyphosis. just postural one.

That's Severe: In general, the severity of the scoliosis depends on the degree of the curvature . Severe scoliosis is defined as more than 70 degrees. If the curvature exceeds 70 degrees, the severe twisting of the spine that occurs in structural scoliosis can cause the ribs to press against the lungs, restrict breathing, and reduce oxygen levels.