Table 3.

Patient and tumour characteristics

Patient no	Age/sex	Side	Axial dimension (mm)	Carlson grade	Regions involved*	Prior surgery**	VC erosion	ICA encased ***	ICA narrowing****
1	42 M	L	52 × 21	3	PS/EC/PF	RS	No	No	None
2	52 M	L	56 × 39	3	MCF/PS/EC/PF	None	Yes	Yes	Moderate
3	67F	L	30 × 23	3	MCF/PS/EC/PF	None	No	Yes	Mild
4	37F	L	25 × 22	2	PF	None	No	No	None
5	72F	R	33 × 24	3	MCF/PF	IT/RS	No	Yes	None
6	49F	R	27 × 19	2	MCF	None	No	No	Mild
7	17F	L	42 × 24	3	MCF/EC/PF	RS	No	No	Moderate
8	22 M	L	20 × 15	2	PS	None	No	No	None
9	74F	R	28 × 16	2	PF	None	No	No	Mild

^*MCF middle cranial fossa, PS parasellar, EC extracranial, PF posterior fossa

^**RS retro-sigmoid, IT infra-labyrinthine

^*** > 270.⁰ ICA encasement

^****Mild if 30–50% area narrowing and moderate if > 50% area narrowing