Complex sentence: Individual differences, such as bone growth disorders, sometimes can be treated through surgery, some hormone disorders can be treated through medication, and by hormone replacement therapy; this treatment must be done before the child's growth plates fuse.
Split into simpler sentences: Individual differences, such as bone growth disorders, sometimes can be treated through surgery. Some hormone disorders can be treated through medication and by hormone replacement therapy; this treatment must be done before the child's growth plates fuse.