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  • Title: [Osteoporotic stress fractures of the sacrum: MR-tomography findings].
    Author: Staatz G, Adam G, Kilbinger M, Günther RW.
    Journal: Rofo; 1997 Apr; 166(4):307-11. PubMed ID: 9198494.
    Abstract:
    PURPOSE: Evaluation of the morphologic appearance of sacral osteoporotic insufficiency fractures in MRI. PATIENTS AND METHOD: 6 patients (5 female and one male, 54-80 years) with osteoporotic insufficiency fractures of the sacrum were examined with CT and MRI. Plain and contrast-enhanced T1- and T2-weighted spin-echo images were acquired, three patients were studied with T1-weighted gradient-echo-sequences with fat suppression. RESULTS: Fracture-lines and sclerotic areas of the massae laterales were visible in 5 of 6 CT examinations, one patient showed no abnormalities of the sacrum on the initially performed CT scans. All patients had a diffuse bone marrow oedema of the fractured massae laterales with a decreased signal on the T1-weighted spin-echo images and an increased signal on the T1-weighted gradient-echo images with fat suppression and in the T2-weighted SE-sequences. Gadopentate dimeglumine enhanced MRI images showed a remarkable diffuse configurated high signal of the whole sacrum in bilateral fractures (H-pattern). An additional soft tissue mass could be excluded in each case. CONCLUSION: Gadopentate dimeglumine enhanced MRI of sacral insufficiency fractures allows early diagnosis and helps to exclude intraosseous tumour formation.
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