MENINGIOMAS: Imaging findings and interpretative pitfalls

Congress:

ECR 2013

Poster Number:

C-1554

Type:

Educational Exhibit

Keywords:

Neoplasia, Education and training, Education, Diagnostic procedure, MR, CT, Catheter arteriography, Neuroradiology brain

Authors:

V. Mayoral Campos¹, M. J. Gimeno Peribáñez¹, J. A. Guirola², C. Bonnet Carron¹, J. I. Pina Leita¹, R. Lasierra Diaz¹; ¹Zaragoza/ES, ²ZARAGOZA, ZA/ES

DOI:

10.1594/ecr2013/C-1554

DOI-Link:

https://dx.doi.org/10.1594/ecr2013/C-1554

Fig. 1: The cleft sign: thin rim of CSF surrounding this large meningioma

Fig. 3: Axial enhanced T1WI. Meningioma with dural tail, hyperostosis and enhancement...

Fig. 2: The subarachnoid vessels that run on the surface of the brain are displaced by...

Fig. 5: Axial CT-scan: bone hyperostosis

Learning objectives

In this e-poster we are willing to remark the following key points: To review and illustrate signs, symptoms and imaging findings of meningiomas brain tumors. To describe the diagnostic difficulties that we have had in our institution in order to help radiologist in training to differentiate meningiomas from other brain tumors-alterations.

Background

Meningiomas are the most common primary brain tumors, representing one-third of all such tumors. They arise from the arachnoid "cap" cells of the arachnoid villi in the meninges. These tumors are usually benign in nature; however, a small percentage are malignant. Imaging information about the dural attachment site, location and severity of edema, and displacement of critical neurovascular structures is useful for planning the operative approach and possible effects. The World Health Organization (WHO) classifies meningiomas into 3 categories: Typical: these lesions are benign and...

Imaging findings OR Procedure details

Meningiomas are slowly growing, well–circumscribed lesions. Due to their indolent course, they are often large at the time of presentation. Meningiomas are extra-axial lesions. It does it means that it is outside the brain because the lesion derives from the lining of the brain or surrounding structures. There are some signs that indicate that the lesion is an extra-axial tumor. CSF cleft : a cleft has been regarded as representing a thin rim of CSF (as seen around the posterior edge of the lesion). High...

Conclusion

The clinical and radiologic aspects of meningiomas are important for many reasons: they are the most common extra-axial neoplasms found in adults, they have high prevalence of signs and symptoms, and they frequently have typically imaging characteristics. Despite these typical aspects, radiologists must be aware of the various and sometimes atypical imaging appearances of meningiomas in order to arrive to the correct diagnose.

References

REFERENCES: Louis DN, Cavenee WK, Ohgaki H et-al. WHO classification of tumours of the central nervous system. WHO. (2007) Siegelman ES, Mishkin MM, Taveras JM. Past, present, and future of radiology of meningioma. Radiographics. 1991;11(5):899-910. Ginsberg LE. Radiology of meningiomas. J. Neurooncol. 1996;29 (3): 229-38. Shaman MA, Zak IT, Kupsky WJ. Best cases from the AFIP: Involuted sclerotic meningioma. Radiographics. 2003;23(3):785-9. Wallace EW. The dural tail sign. Radiology. 2004;233(1):56-7 Siegelman ES, Mishkin MM, Taveras JM. Past, present, and future of radiology of meningioma. Radiographics. 1991;11(5):899-910....