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Table 1: Imaging findings
Findings No. of Patients
Position/No. of root nerves involved 
    Unilateral, single root 113
    Bilateral, single root 78
    Bilateral, ≥2 roots 22
Nerve root localization 
    L4 1
    L5 1
    S1 16
    S2 142
    S3 120
    S4–S5 9
Aspirated cyst size, cm 
    1–2 1
    2–3 111
    3–4 32
    >4 8

Findings	No. of Patients
Position/No. of root nerves involved
Unilateral, single root	113
Bilateral, single root	78
Bilateral, ≥2 roots	22
Nerve root localization
L4	1
L5	1
S1	16
S2	142
S3	120
S4–S5	9
Aspirated cyst size, cm
1–2	1
2–3	111
3–4	32
>4	8