Review the treatment of insufficiency fractures in detail. Pathogenesis, diagnosis, and imaging are discussed, along with nonsurgical and surgical management options. Treatment specific to stress fractures of the spine, pelvis, and lower extremity is reviewed, as well as fractures that occur in specific patient groups such as those in the military or those using prostheses. The Monograph Series draws on current literature to support diagnosis, initial treatment, and management decision making for specific orthopaedic conditions.