This issue of the Endocrinology and Metabolism Clinics, guest edited by Drs. Leonid Poretsky and Emilia Pauline Liao, will focus on Diabetes Mellitus: Associated Conditions. Articles in this issue include Metabolic syndrome; The role of glucocorticoids and insulin resistance in adipose tissue function and lipid metabolism; Cardiovascular disease; The Relationships between Cardiovascular Disease and Diabetes: Focus on Pathogenesis; Interventions for coronary artery disease; Peripheral Arterial Disease; Hypertension; Sleep apnea; Osteoporosis; Vitamin D deficiency; Diabetes and cancer; Dementia; Depression; and Polycystic Ovary Syndrome.