MR appearance of postoperative foreign body granuloma: Case report with pathologic confirmation
[Show abstract] [Hide abstract] ABSTRACT: Imaging assessment of the lumbosacral spine following surgery is complex and depends upon several factors, including the anatomy of the patient, the surgical procedure and the disease process for which it was performed, the age of the patient, the biomechanical condition of the underlying cortical and cancellous bone, intervertebral disc and musculoligamentous tissues, the time since surgery procedure and the duration and nature of the postsurgical syndrome. Depending upon these factors, one or a combination of complementary imaging modalities may be required to demonstrate any clinically relevant abnormality, to assist the surgeon in deciding if repeat surgery is necessary, its nature and at which vertebral level(s) it should be directed. This review stresses the important role of MRI following lumbar discectomy, intervertebral fusion and/or instrumentation in achieving the most beneficial and timely outcome in the patient presenting with an acute, subacute or chronic failed back surgery syndrome.0Comments 64Citations
- "...s tissue reaction peripherally, and central foreign body material lacking mobile protons (Fig. 10) . This also explains the centrally nonenhancing area on contrast-enhanced T1-weighted images. ..."The lesion shows a moderate degree of peripheral contrast enhancement on T1- weighted images, believed to be related to an inflammatory foreign-body reaction. On T2-weighted images these lesions give low signal, presumably reflecting a dense fibrous tissue reaction peripherally, and central foreign body material lacking mobile protons (Fig. 10) . This also explains the centrally nonenhancing area on contrast-enhanced T1-weighted images.
- [Show abstract] [Hide abstract] ABSTRACT: This report describes two cases of textiloma (gossypiboma, foreign body granuloma). These so-called "cottonoids" (Codman, U.S.A.) were inadvertently left behind in the operation wound following spinal surgery for an intervertebral disk herniation. Both textilomas were located paraspinally. These relatively uncommon lesions should be differentiated from paraspinal tumors, as well as from other postoperative complications, such as scar formation. Although plain radiography generally gives a characteristic image due to a marking filament, the CT and especially MR findings are less well known.0Comments 50Citations
- [Show abstract] [Hide abstract] ABSTRACT: Gadolinium-DTPA enhanced MRI is the modality of choice when imaging central nervous system infratentorial tumors in the pediatric population. The detection of a new enhancing lesion following initiation of therapy is typically considered pathognomonic for recurrent or metastatic tumor. We report two pediatric patients with infratentorial central nervous system tumors who demonstrated new areas of enhancement with gadolinium-DTPA enhanced MRI following initiation of multimodality therapy. Both patients had surgical biopsy of the new lesions with histologic review failing to demonstrate viable tumor. These studies suggest caution in considering new enhancing lesions detected by MRI in a child with a brain tumor pathognomonic for new sites of active tumor.0Comments 4Citations
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