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Table 2: Imaging and pathologic findings
Tumor Type/Imaging Findings En Plaque Dumbbell Fusiform Total Percentage
Tumor location 
    Cervical spine 8 4 0 12 86%
    Thoracic spine 1 0 1 2 14%
Well-defined boundary 0 1 1 2 14%
Dural thickening 8 3 0 11 79%
Dural calcification 6 2 0 8 57%
Adherence to nerve roots 7 4 0 11 79%
Neural foramen enlargement 6 4 0 10 71%
Bone erosion 2 3 0 5 36%
Intradual invasion 4 4 0 8 57%
Epidural mass formation 7 4 1 12 86%
Spinal cord compression 8 3 1 12 86%
T1WI 
    Isointensity 6 2 0 8 57%
    Hypointensity 3 2 1 6 43%
T2WI 
    Isointensity 3 2 0 5 36%
    Hypointensity 5 2 0 7 50%
    Heterogeneous 1 0 1 2 14%
Dural tail sign 8 4 1 13 93%
Tumor enhancement 
    Moderate 2 3 0 5 36%
    Marked 7 1 1 9 64%
Pathologic type 
    Psammomatous 7 3 0 10 71%
    Meningothelial 1 1 0 2 14%
    Transitional 1 0 0 1 7%
    Angiomatous 0 0 1 1 7%

Tumor Type/Imaging Findings	En Plaque	Dumbbell	Fusiform	Total	Percentage
Tumor location
Cervical spine	8	4	0	12	86%
Thoracic spine	1	0	1	2	14%
Well-defined boundary	0	1	1	2	14%
Dural thickening	8	3	0	11	79%
Dural calcification	6	2	0	8	57%
Adherence to nerve roots	7	4	0	11	79%
Neural foramen enlargement	6	4	0	10	71%
Bone erosion	2	3	0	5	36%
Intradual invasion	4	4	0	8	57%
Epidural mass formation	7	4	1	12	86%
Spinal cord compression	8	3	1	12	86%
T1WI
Isointensity	6	2	0	8	57%
Hypointensity	3	2	1	6	43%
T2WI
Isointensity	3	2	0	5	36%
Hypointensity	5	2	0	7	50%
Heterogeneous	1	0	1	2	14%
Dural tail sign	8	4	1	13	93%
Tumor enhancement
Moderate	2	3	0	5	36%
Marked	7	1	1	9	64%
Pathologic type
Psammomatous	7	3	0	10	71%
Meningothelial	1	1	0	2	14%
Transitional	1	0	0	1	7%
Angiomatous	0	0	1	1	7%