Prolonged grief disorder (PGD) - sometimes called complicated grief - is a newly recognized condition listed in the Diagnostic and Statistical Manual (DSM). While many people adapt to loss, some individuals experience disabling chronic grief. Research suggests that about 7%-10% of bereaved adults and 5%-10% of children and adolescents who have lost a loved one may develop PGD, with symptoms that mimic those of depression, anxiety, or post-traumatic stress disorder (PTSD).