title: Giant Cell Tumor within the Proximal Tibia after ACL Reconstruction.
abstract: 26-year-old female with prior anterior cruciate ligament reconstruction developed an enlarging lytic bone lesion around the tibial screw with sequential imaging over the course of one year demonstrating progression of this finding, which was confirmed histologically to be a giant cell tumor of bone. The lesion originated around the postoperative bed, making the diagnosis challenging during the early course of the presentation. The case demonstrates giant cell tumor which originated in the metaphysis and subsequently grew to involve the epiphysis; therefore, early course of the disease not involving the epiphysis should not exclude this diagnosis.
authors.affiliation: Department of Radiology, University of Minnesota Medical Center, 420 Delaware Street SE, MMC 292, Minneapolis, MN 55455, USA.
authors.forename: Takashi
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Orthopaedic Surgery, University of Minnesota Medical Center, 2450 Riverside Avenue, Suite R200, Minneapolis, MN 55454, USA.
authors.forename: Lauren
authors.initials: L
authors.lastname: MacCormick
authors.affiliation: Department of Radiology, University of Minnesota Medical Center, 420 Delaware Street SE, MMC 292, Minneapolis, MN 55455, USA.
authors.forename: Jutta
authors.initials: J
authors.lastname: Ellermann
authors.affiliation: Department of Orthopaedic Surgery, University of Minnesota Medical Center, 2450 Riverside Avenue, Suite R200, Minneapolis, MN 55454, USA.
authors.forename: Denis
authors.initials: D
authors.lastname: Clohisy
authors.affiliation: Department of Radiology, University of Minnesota Medical Center, 420 Delaware Street SE, MMC 292, Minneapolis, MN 55455, USA.
authors.forename: Shelly
authors.initials: S
authors.lastname: Marette