title: MRI and FDG PET/CT Findings of Primary Orbit Leiomyosarcoma.
abstract: Primary leiomyosarcoma of the orbit is extremely rare. Here we report the case of a 32-year-old woman who presented with proptosis and diplopia of the left eye. MRI examination showed a solid mass in the left orbit with invasion to adjacent tissue, and the lesion had intense FDG uptake with SUVmax of 18.7 on F-FDG PET/CT. Primary orbit leiomyosarcoma was diagnosed by surgery-pathology. F-FDG PET/CT has an advantage in excluding secondary or metastatic orbit malignancy.
authors.affiliation: From the *PET Center, Huashan Hospital, and †Department of Ophthalmology, Eye and Ear-Nose-Throat Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Weiyan
authors.initials: W
authors.lastname: Zhou
authors.forename: Fengchun
authors.initials: F
authors.lastname: Hua
authors.forename: Jiang
authors.initials: J
authors.lastname: Qian
authors.forename: Yingwen
authors.initials: Y
authors.lastname: Bi
authors.forename: Yihui
authors.initials: Y
authors.lastname: Guan
mesh_terms: D000328:Adult; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007890:Leiomyosarcoma / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging*; D000072078:Positron Emission Tomography Computed Tomography; D019275:Radiopharmaceuticals
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18