Is anyone familiar with hemihypertrophy?

Yes. One side of your body grows more rapidly than the other. The outcome will vary from one person to the next. But the larger side, for instance in the muscles and ribs around the spine can either pull the weaker, less muscled side over, or push it over, so that a curve will develop. Depending on which is happening, the side that is concave must be stretched and the weaker side strenthe minimize the.