File:Anaplastic meningioma with recurrence (Radiopaedia 34452-35783 Axial T1 4).png

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Anaplastic_meningioma_with_recurrence_(Radiopaedia_34452-35783_Axial_T1_4).png ‎(512 × 512 pixels, file size: 161 KB, MIME type: image/png)

Summary:

Description
  • Radiopaedia case ID: 34452
  • Image ID: 11213002
  • Image stack position: 4/21
  • Plane projection: Axial
  • Aux modality: T1
  • Study findings: Extra-axial intermediate T2 signal avidly enhancing lobulated lesion is noted centered on the right greater wing of the sphenoid / squamous temporal bone. There is destruction of the calvarium with extension into the overlying temporalis muscle. On CT scan, the bony margins are quite destructive. Slight reduction in diffusion is noted in the lesion suggestive of a cellular lesion. The lesion measures 2.9 x 5.5 x 4.6 cm (trans x ap x cc). Small amount of associated dural thickening is noted. The lesion appears to be solitary. Underlying vasogenic edema is noted in the temporal and frontal lobe with slight mass effect. Given the degree of osseous destruction the possibility of a more aggressive lesion such as a hemangiopericytoma or a metastases (if the patient is known to have a malignancy) should also be considered.
  • Modality: MRI
  • System: Oncology
  • Findings: Erosion of the lateral aspect of the right greater wing of sphenoid and adjacent squamous temporal bone is noted. Aggressive regional periosteal reaction is noted in the region. Associated with this is a contrast-enhancing irregular shaped extra-axial mass conforming to the contour of the sphenoid wing. This is a solitary lesion. There is moderate underlying vasogenic edema. No midline shift. Basal cisterns are not effaced. Conclusion: Aggressive extra-axial mass centered on the right sphenoid wing with osseous invasion. Atypical meningioma is favored with invasive dural metastasis (e.g. prostate primary) remaining a differential.
Date Published: 22nd Feb 2015
Source https://radiopaedia.org/cases/anaplastic-meningioma-with-recurrence
Author Rajalakshmi Ramesh
Permission
(Permission-reusing-text)		 http://creativecommons.org/licenses/by-nc-sa/3.0/

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