Although both dissociative fugue and dissociative amnesia are both based upon amnesia, DSM-IV TR considers them as a separate entity. In Dissociative fugue the primary phenomenon is generalised amnesia. It is associated with 2 other secondary phenomenon - travel with a purpose and a new identity. In dissociative amnesia the travel is purposeless. They wander in perplexity and attract attention to themselves. Ref: Dissociation and the Dissociative Disorders: DSM-V and Beyond, Edited by Paul F. Dell, John A. O'Neil, 2009, Pages 430-431; Loewenstein and Putnam, 2004.