Imaging characteristics of a rare case of monostotic fibrous dysplasia of the sacrum:A case report  

作　　者：Xin-Xin Liu Xin Xin Yu-Hong Yan Xiao-Wen Ma 

机构地区：[1]MRI Department,Honghui Hospital,Xi'an Jiaotong University,Xi'an 710054,Shaanxi Province,China [2]Department of Orthopaedics,Ankang Center Hospital,Ankang 725000,Shaanxi Province,China

出　　处：《World Journal of Clinical Cases》2021年第5期1111-1118,共8页世界临床病例杂志

摘　　要：BACKGROUND Fibrous dysplasia(FD)is a common benign intramedullary fibro-osseous lesion.Involvement of the spine is rare,with the literature including only case reports,and cases of monostotic FD(MFD)in the sacrum are extremely rare.A correct preoperative diagnosis of spinal MFD is important for clinicians to select proper treatment.CASE SUMMARY We retrospectively assessed a case report of MFD in the sacrum.This patient was examined by computed tomography(CT)and magnetic resonance imaging(MRI),and the diagnosis was confirmed by pathology.A review of the literature was performed to analyze the imaging characteristics and differential diagnoses of spinal MFD.For our patient,the CT scan showed the lesion to be expansile,with ground glass opacity and a sclerotic rim.On MRI,the lesion showed iso-low signal intensity on T1WI and iso-high signal intensity on T2WI.A low signal rim was found on T1WI and T2WI.Our patient was treated by posterior focal excision,decompression,bone grafting,fusion and pedicle screw fixation.A satisfactory result was achieved,with pain disappearance.No complications had occurred at the 1-year follow up.CONCLUSION MFD is an expansile osteolytic change.Ground glass opacity and a sclerotic margin are obvious characteristics.The lesion often involves the vertebral body and posterior element.Knowledge of these imaging characteristics of spinal FD could be helpful for diagnosis and prevent unnecessary procedures.

关 键 词：MONOSTOTIC SACRUM Fibrous dysplasia SPINE Computed tomographic Case report Magnetic resonance imaging 

分 类 号：R681[医药卫生—骨科学]