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MR appearance of parasymphyseal insufficiency fractures of the os pubis |
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| Authors: | Mariko Hosono H Kobayashi Ryota Fujimoto Kazushige Tsutsui Yoshihiko Kotoura Tadao Tsuboyama Hikaru Hayashi Takashi Nakamura Junji Konishi |
| Institution: | (1) Department of Nuclear Medicine, Faculty of Medicine, Kyoto University, 54 Shogoin-kawahara-cho, Sakyo-ku, Kyoto, 606-01 Japan, JP;(2) Nulcear Medicine Department, National Institutes of Health, Building 10, Room 1C-401, Bethesda, MD 20892, USA, US;(3) Department of Radiology, Japanese Red Cross Society Wakayama Medical Center, Wakayama, Japan, JP;(4) Department of Orthopaedic Surgery, Nagahama City Hospital, Nagahama, Shiga, Japan, JP;(5) Department of Orthopaedic Surgery, Faculty of Medicine, Kyoto University, Kyoto, Japan, JP;(6) Department of Orthopaedic Surgery, Japanese Red Cross Society Wakayama Medical Center, Wakayama, Japan, JP |
| Abstract: | Objective. To clarify the MRI features of parasymphyseal insufficiency fractures of the os pubis. Design and patients. MRI was performed in four postmenopausal women with parasymphyseal insufficiency fractures. The diagnosis was confirmed with plain films in every patient. T1-weighted and T2-weighted images were obtained in four patients using a 1.5-T unit. Postcontrast T1-weighted imaging was also done in three patients. Results and conclusions. MRI of pubic parasymphyseal insufficiency fracture characteristically demonstrates a hyperintense mass lesion with a hypointense rim on T2-weighted imaging, showing peripheral and septal enhancement after contrast administration. It is important to have this entity in mind in patients with osteoporosis, especially in patients with a history of pelvic irradiation for malignant disease, so as not to misinterpret it as a chondroid tumor or bone metastasis. |
| Keywords: | Insufficiency fracture Pubic bone MRI |
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