Recent years have seen an increasing interest in IT project portfolio management. Consequently, a considerable number of respective practices and approaches have been published. However, these contributions are scattered through a large number of journals and conferences and address very different topics. Therefore, this contribution sets out to locate the relevant body of literature related to IT project portfolio management in a structured way and to integrate the existing findings. We discuss the relationship between IT project portfolio management and other kinds of project portfolio management in order to shape the profile of this field of research. In this context we highlight strong interdependencies and a specific governance context as key characteristics of IT project portfolio management. In order to identify success factors and contingency factors we analyze contributions of empirical nature. Additionally, we investigate mathematical approaches and decision support systems in regard to their potential to effectively support IT project portfolio management. Finally, we provide a research agenda with the intention of motivating and directing further contributions in this field.