Recently, more empirical studies have been devoted to the investigation of borderline personality disorder (BPD) in children and adolescents. Against this background, the purpose of the current review is to compare research findings on diagnostic-related phenomena in child and adolescent samples with those in adult samples to establish the utility of the BPD construct in childhood and adolescence. A search of relevant publications reported in Pubmed and PsycInfo from 1940 (the first clinical descriptions of BPD in childhood) to 2006 was carried out. A total of 58 studies were included. The review of the adult literature was not exhaustive but relied on excellent existing and comprehensive reviews of the adult literature carried out in the past 5 years. Although significant differences seem to exist between juveniles and adults in diagnostic-related phenomena associated with BPD, these can be explained by the principle of heterotypic continuity in development. Moreover, enough overlap between juvenile and adult BPD has been observed to warrant further empirical investigation into the construct of juvenile BPD. Specific areas for future research in juvenile BPD suggested by this review include studies of comorbidity, measure development, and the use of neurobiological measures such as functional neuroimaging.