Scoliosis Barbie? Kyphosis Ken would go along with it, too. (Scoliosis is a side-to-side curve in the spine, and is mostly seen in young/teenage girls. Kyphosis is a forward [back-to-front] curve in the spine, and is mostly seen in young/teenage boys. I had kyphosis in high school, and wore a neck-to-waist back brace for about two years [most of the day, and overnight] in high school.) Aloha, Brad