We have added information about informed consent to two case reports published in the 2015 volume of Endocrinology and Metabolism because we found that a description of informed consent was missing from those reports. Although in its submission guidelines, Endocrinology and Metabolism indicates that information about informed consent should be included in the Methods section, the two papers listed below did not present a description of informed consent. The editorial office verified that the authors received informed consent for the use of the patients' photographs or other information through the publication ethics form that was included when the papers were submitted. Accordingly, the editorial office would like to issue an apology to our readers and to add the corresponding ethics statements to the Methods section of each paper.