title: Object cathexis in a borderline twin.
mesh_terms: D000293:Adolescent; D002648:Child; D002653:Child Behavior Disorders; D002658:Developmental Disabilities; D004200:Diseases in Twins; D004532:Ego; D006801:Humans; D008297:Male; D009769:Object Attachment; D011575:Psychoanalytic Therapy; D011613:Psychotherapy