AUTHOR=Chen Pan , Cheng Junfeng , Zhang Lin TITLE=Rare Giant Retroperitoneal Melanotic Schwannoma: A Case Report and Literature Review JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1448112 DOI=10.3389/fonc.2024.1448112 ISSN=2234-943X