The research described in this thesis was performed with the aim to evaluate and improve multidisciplinary treatment of anorectal malformation patients. An overview of current literature on treatment of anorectal malformations is given in the Preface section, which also includes an overview of this thesis.

The results of the research are presented in two parts: Part 1 focuses on postnatal care and contains retrospective studies, while Part 2 focuses on long-term outcome from childhood into adulthood, and presents a cohort study and prospective studies.

Then, the General discussion, Recommendations, and Summaries form Part 3, and Appendices are provided in Part 4.