Suprasellar meningioma classification [Neurosurgery Wiki]

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====== Suprasellar meningioma classification ======


Suprasellar meningiomas can be classified as tubercular, combined, or diaphragmatic based on preoperative MRI. 

Exclusively tubercular meningiomas (type A) require only a supradiaphragmatic approach. 

Tumor involvement of the sellar diaphragm (type B or C) requires resection of the diaphragm and thus a combined infra- and supradiaphragmatic approach
((Ajlan AM, Choudhri O, Hwang P, Harsh G. Meningiomas of the tuberculum and
diaphragma sellae. J Neurol Surg B Skull Base. 2015 Feb;76(1):74-9. doi:
10.1055/s-0034-1390400. Epub 2014 Sep 29. PubMed PMID: 25685653; PubMed Central
PMCID: PMC4318732.
)).

Liu divided it into

Group A - [[planum sphenoidale meningioma]]

Group B - [[tuberculum sellae meningioma ]]

Group C -[[diaphragma sellae meningioma]] (DSM), based on their growth pattern in relation to the optic pathway and pituitary stalk, group C was then divided into groups C1 and C2
((Liu Y, Chotai S, Ming C, Jin S, Pan J, Qi S. Characteristics of midline
suprasellar meningiomas based on their origin and growth pattern. Clin Neurol
Neurosurg. 2014 Oct;125:173-81. doi: 10.1016/j.clineuro.2014.08.002. Epub 2014
Aug 10. PubMed PMID: 25171391.
)).

For Suri et al. the  [[anterior clinoid process]], and sphenoidal planum, account for about 5% to 10% of intracranial meningiomas
((Suri A, Narang KS, Sharma BS, Mahapatra AK. Visual outcome after surgery in patients with suprasellar tumors and preoperative blindness. J Neurosurg. 2008;108:19–25.)).

The tumour is located in the midline at the base of the skull and originates in the sella
((Dehdashti AR, Ganna A, Witterick I, Gentili F. Expanded endoscopic endonasal approach for anterior cranial base and suprasellar lesions: indications and limitations. Neurosurgery. 2009;64:677–87.)).