Introduction to Separation Anxiety: a guide to the clinical syndrome -- Childhood Separation Anxiety: Human and Preclinical Studies -- The Psychodynamic Significance of Separation Anxiety -- Separation Anxiety in the DSM-5 -- Separation Anxiety and Other Anxiety Disorders -- Separation Anxiety and Posttraumatic Stress Disorder -- The Relationship between Separation Anxiety and Bipolar Disorder -- The distinction of Adult Separation Anxiety Disorder: Evidence and Uncertainty -- Clinical Case descriptions and discussion -- Conclusion. .