title: Osteonecrosis Mimicking Bone Metastasis in Femoral Head on (18)F-FDG PET/CT: A Case Report.
abstract: A 77-year-old woman underwent chemotherapy, radiotherapy, and brachytherapy for cervical cancer 9 years ago. On a follow-up (18)F-fluorodeoxyglucose (FDG) PET/CT image, focal FDG uptake was noted in a focal osteolytic lesion in the right femoral head. During magnetic resonance imaging, this lesion showed subchondral dark-signal-intensity rim on T1-weighted image and double line sign on T2-weighted image, suggestive of osteonecrosis. The lesion was pathologically confirmed as osteonecrosis after surgery. This case demonstrates that osteonecrosis of the femoral head may demonstrate focal FDG uptake mimicking bone metastasis.
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea.
authors.forename: Kyu-Ho
authors.initials: KH
authors.lastname: Choi
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea.
authors.forename: Jin Kyoung
authors.initials: JK
authors.lastname: Oh
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea ; Department of Nuclear Medicine, Seoul St.Mary's Hospital, The Catholic University of Korea, Seochogu Banpodong 505, 137-701 Seoul, Korea.
authors.forename: Sung Hoon
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea.
authors.forename: Ik Dong
authors.initials: ID
authors.lastname: Yoo
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea.
authors.forename: Eun Kyoung
authors.initials: EK
authors.lastname: Choi
authors.affiliation: Department of Radiology, The Catholic University of Korea, Seoul, Korea.
authors.forename: Eun Ji
authors.initials: EJ
authors.lastname: Han
keywords: 18F-fluorodeoxyglucose; Avascular necrosis; Bone metastasis; Femoral head; Positron emission tomography/computed tomography