AUTHOR=Zhang Jianhua , Xie Zhenjun , Su Wei TITLE=Transverse V-Y advancement composite tissue flap for repairing defects after longitudinal melanonychia excision—a retrospective cohort study JOURNAL=Frontiers in Surgery VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2025.1575700 DOI=10.3389/fsurg.2025.1575700 ISSN=2296-875X