宗像　裕太郎    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Associate Professor
Article types	Original article
Language	English
Peer review	Peer reviewed
Title	Incidence of osteonecrosis and insufficiency fracture of the hip and knee joints based on MRI in 300 renal transplant patients.
Journal	Formal name：Hip international : the journal of clinical and experimental research on hip pathology and therapy Abbreviation：Hip Int ISSN code：17246067/11207000
Domestic / Foregin	Foregin
Volume, Issue, Page	29(3),pp.316-321
Author and coauthor	Ohtsuru Tadahiko, Yamamoto Takuaki, Murata Yasuaki, Morita Yuji, Munakata Yutaro, Kato Yoshiharu, Okazaki Ken
Publication date	2019/05
Summary	INTRODUCTION:The purpose of this study was to investigate the incidence of necrosis and insufficiency fracture of the hip and knee using magnetic resonance imaging (MRI) in renal transplant patients.METHODS:We examined 300 consecutive renal transplant patients using MRI of the hips and knees (T1-weighted coronal MRI) preoperatively and at 3 and 6 months postoperatively. Oblique axial-plane T1-weighted MRI and short-tau inversion-recovery T2-weighted MRI were performed parallel to the femoral neck when distinguishing the osteonecrosis of the femoral head (ONFH) from subchondral insufficiency fracture (SIF) of the femoral head was difficult.RESULTS:ONFH was observed in 3 hips (3 cases, 1.0%). Osteonecrosis of the knee was observed in 2 knees (1 case, 0.3%). SIF of the femoral head was observed in 5 hips (3 cases, 1.0%). Bilateral simultaneous onset of SIF of the femoral head was observed in 2 cases (0.7%). Insufficiency fracture of the knee was observed in 2 knees (1 case, 0.3%).CONCLUSIONS:When it was difficult to distinguish ONFH from SIF of the femoral head, oblique axial-plane T1-weighted MRI and the short-tau inversion-recovery T2-weighted MRI parallel to the femoral neck were useful to establish the correct diagnosis.
DOI	10.1177/1120700018808693
PMID	30547689