Proceedings of the Derma Forum conference, Bled, December 3rd–4th, 2021 Katarina Trčko, guest editor S1 2022;31 Suppl:S1 doi: 10.15570/actaapa.2022.s1 For many years, the Association of Slovenian Dermatovenereolo- gists has been holding a conference called Derma Forum. The aim of Derma Forum is to provide an opportunity for dermatology resi- dents to present unusual clinical cases from their daily practice in cooperation with their mentors. Because the majority of the cases presented were extremely interesting and instructive, it was decided that a collection of case reports from the last conference was worthy of a supplement to the journal Acta Dermatovereno- logica Alpina, Pannonica et Adriatica (Acta Dermatovenerol APA). Furthermore, it is also an opportunity for young residents to gain valuable experience with writing research articles. All the manu- scripts in this supplement were subjected to the standard quality- control protocols imposed by Acta Dermatovenerol APA, including screening for plagiarism and peer-review by independent review- ers. We would like to congratulate all the authors and thank them for their diligence. We also thank the editor-in-chief for his efforts in bringing this supplement together. We all hope that the journal continues to publish supplements, and that our readers will find the content interesting and useful for daily practice. Acta Dermatovenerologica Alpina, Pannonica et Adriatica Acta Dermatovenerol APA Editorial