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  • Title: MR appearance of parasymphseal insufficiency fractures of the os pubis.
    Author: Hosono M, Kobayashi H, Fujimoto R, Tsutsui K, Kotoura Y, Tsuboyama T, Hayashi H, Nakamura T, Konishi J.
    Journal: Skeletal Radiol; 1997 Sep; 26(9):525-8. PubMed ID: 9342811.
    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.
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