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. 2021 Sep 18;22:805. doi: 10.1186/s12891-021-04685-9

Fig. 2.

Fig. 2

Types of leakage. a. Type B (through the basivertebral vein). b. Type S (through the segmental vein). c. Type C (through a cortical defect). d. Type D (intradiscal leakage). The venous type: a, b. The cortical type: c, d