The aim of the present study was to relate and compare two approaches to personality pathology in adolescents. Dimensions of personality pathology, assessed by the Dimensional Assessment of Personality Pathology-Basic Questionnaire for Adolescents (DAPP-BQ-A; Tromp & Koot, 2008), were related to DSM-IV personality disorder (PD) symptoms in 168 adolescents referred for mental health services. Correlational analyses revealed that the DAPP-BQ-A higher- and lower-order dimensions were related to PD symptoms in predictable ways. Regression analyses showed that for all but three PDs (Schizoid, Schizotypal, and Passive-Aggressive), lower-order dimensions accounted for unique variance, after controlling for gender, age, and co-occurring PD symptoms. It is concluded that dimensional assessment may provide valuable information on adolescent personality pathology, and facilitate the study of developmental antecedents of adult personality pathology. © 2009 The Guilford Press.