While the notion of pathological grief goes back at least as far as Freud's "Mourning and Melancholia", its recognition as a distinct mental disorder has met with some opposition. Holly Prigerson's work aims to establish evidence validating the existence of distinctive symptoms of prolonged grief disorder (PGD): a disturbance of attachment characterized by longing for the deceased, a loss of meaning and a disturbance of identity that can be enduring, distressing and disabling, and require targeted treatment. Prolonged grief disorder has recently been included in the ICD-11 and DSM-5-TR as a new mental disorder. Good or bad idea? Holly Prigerson will outline her arguments in defense of this choice, and the therapeutic avenues she associates with it.