Abstract
Objectives
Vertebral invasion is a key prognostic factor and a critical aspect of surgical planning for superior sulcus tumors. This study aims to further evaluate MRI features of vertebral invasion in order to distinguish it from reactive inflammatory changes.
Methods
Between 2000 and 2016, a retrospective study was performed at a single institution. All patients with superior sulcus tumors undergoing surgery, including at least two partial vertebrectomies, were included. An expert radiologist evaluated qualitative and quantitative MRI signal intensity characteristics (contrast-to-noise ratio [CNR]) of suspected involved and non-involved vertebrae. A comparison of CNR of invaded and sane vertebrae was performed using non-parametric tests. Imaging data were correlated with pathological findings.
Results
A total of 92 surgical samples of vertebrectomy were analyzed. The most specific sequences for invasion were T1 and T2 weighted (92% and 97%, respectively). The most sensitive sequences were contrast enhanced T1 weighted fat suppressed and T2 weighted fat suppressed (100% and 80%). Loss of extrapleural paravertebral fat on the T1-weighted sequence was highly sensitive (100%) but not specific (63%). Using quantitative analysis, the optimum cut-off (p < 0.05) to distinguish invasion from reactive inflammatory changes was CNR > 11 for the T2-weighted fat-sat sequence (sensitivity 100%), CNR > 9 for contrast-enhanced T1-weighted fat-suppressed sequence (sensitivity 100%), and CNR < − 30 for the T1-weighted sequence (specificity 97%). Combining these criteria, 23 partial vertebrectomies could have been avoided in our cohort.
Conclusion
Qualitative and quantitative MRI analyses are useful to discriminate vertebral invasion from reactive inflammatory changes.
Key Points
• Abnormal signal intensity in a vertebral body adjacent to a superior sulcus tumor may be secondary to direct invasion or reactive inflammatory changes.
• Accurate differentiation between invasion and reactive inflammatory changes significantly impacts surgical planning. T1w and T2w are the best sequences to differentiate malignant versus benign bone marrow changes. The use of quantitative analysis improves MRI specificity.
• Using contrast media improves the sensitivity for the detection of tumor invasion.
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Abbreviations
- ACCP:
-
American College of Chest Physicians
- CNR:
-
Contrast-to-noise ratio
- CT:
-
Computed tomography
- MRI:
-
Magnetic resonance imaging
- NCNN:
-
National Comprehensive Cancer Network
- NICE:
-
National Institute for Clinical Excellence
- NPV:
-
Negative predictive value
- PACS:
-
Picture Archived Centralized System
- PPV:
-
Positive predictive value
- ROC curve:
-
Receiver operating characteristic curve
- ROI:
-
Region of interest
- SD:
-
Standard deviation
- STIR:
-
Short tau inversion recovery
- T1w:
-
T1-weighted images
- T2w:
-
T1-weighted images
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We thank Dr. Celine Denoiseux for editing the manuscript.
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The scientific guarantor of this publication is Dr. Caramella Caroline.
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• Retrospective
• Observational
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Mihoubi Bouvier, F., Thomas De Montpréville, V., Besse, B. et al. Can MRI differentiate surrounding vertebral invasion from reactive inflammatory changes in superior sulcus tumor?. Eur Radiol 31, 8991–8999 (2021). https://doi.org/10.1007/s00330-021-08001-w
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DOI: https://doi.org/10.1007/s00330-021-08001-w