Psammomatous meningioma - parafalcine

Case contributed by A.Prof Frank Gaillard

Presentation

Incidental finding when the patient's brain was scanned for hyperglycaemia induced altered concious state.

Patient Data

Age: 55 years
Gender: Female

CT scan

Modality: CT

Scan performed in the emergency department demonstrates a large calcified extra-axial mass in the left anterior cranial fossa. 

Modality: MRI

The mass is of heterogeneous signal with a central area of low signal on all sequences and a more iso-intense component on T1 and T2 sequences posterolaterally. Most of the mass enhances and demonstrates signal loss and blooming. A moderate amount of oedema is present in the adjacent brain.  

Case Discussion

This case highlights how large masses can grow if located in so-called silent areas of the brain (typically temporal and frontal lobes). Also note how difficult it is to predict the degree of enhancement of a mass based on the degree of calcification (which in this case is due to psammoma bodies). 

Histology

MICROSCOPIC DESCRIPTION: Paraffin sections show a moderately hypercellular meningioma
containing numerous calcified and hyalinised psammoma bodies. Tumour cells have regular nuclear features. No mitotic figures or areas of necrosis are identified and there is no evidence of brain invasion.

DIAGNOSIS: Psammomatous meningioma (WHO grade I)

PlayAdd to Share
Case
Full screen case
Case with hidden diagnosis
Full screen case with hidden diagnosis

Case Information

rID: 14221
Diagnostic certainty: Certain
Inclusion in quiz mode: Included

Updating… Please wait.
Loadinganimation

Alert_accept

Error Unable to process the form. Check for errors and try again.

Alert_accept Thank you for updating your details.