MR imaging findings in patients with bone-chip allografts

AJR. American Journal of Roentgenology
J S JelinekB H Berrey

Abstract

Increasing use of MR to evaluate primary bone neoplasms has stimulated numerous articles on the initial assessment of these lesions. However, scant MR literature has been written about the postoperative MR appearance. We studied the MR appearance of lesions treated by curettage followed by packing with cancellous bone-chip allograft. We retrospectively reviewed the MR scans of 18 consecutive patients treated in this way. Pathologic diagnoses of these lesions were confirmed according to commonly accepted criteria. The allograft sites showed a distinctive pattern of speckled bright signal on T1-weighted images in eight cases. Thirteen of 18 grafts showed a whorled or speckled pattern of increased signal on the T2-weighted images. Only four allograft regions had predominantly low signal on both T1- and T2-weighted images. Two of 18 patients had recurrent tumor proved by open biopsy. MR images in these cases showed areas of homogeneous signal that replaced areas of speckled hyperintensity on both T1- and T2-weighted images. In both these recurrences the tumor had signal intensity similar to that seen on the preoperative MR study. We conclude that knowledge of the MR appearance of cancellous bone chip allografts is important to avoi...Continue Reading

Citations

May 14, 2014·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Andrew M Zbojniewicz, Joel I Sorger
Mar 22, 2006·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Francesca D BeamanJames K DeOrio
Apr 29, 2006·Radiologic Clinics of North America·Francesca D BeamanMark J Kransdorf
Jan 1, 1993·Magnetic Resonance Imaging·R Kier
Oct 29, 2000·Neuropathology and Applied Neurobiology·M K LuabeyaR L Hamilton
Dec 12, 2020·Seminars in Musculoskeletal Radiology·Johan L BloemIris M Noebauer-Huhmann

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