JIMD Reports - Case and Research Reports, Volume 13 is a professional publication that focuses on case and short research reports in the field of inherited metabolic disorders. These reports provide valuable insights into unusual or previously undocumented features that are significant for understanding these disorders. The case reports not only document rare clinical or biochemical characteristics but also serve as important reminders of the distinctive traits of Mendelian diseases. The collection of reports in this volume is a valuable resource for professionals involved in the diagnosis and treatment of inherited metabolic disorders. The publication contributes to scientific discussion and the advancement of knowledge in this specialized medical field.