title: Perivascular epithelioid cell tumor arising in the sacrum: a case report.
authors.affiliation: Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Yoon Sung
authors.initials: YS
authors.lastname: Bae
authors.affiliation: Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Se Hoon
authors.initials: SH
authors.lastname: Kim