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CT post myelogram confirms an extradural collection of contrast enhanced cerebrospinal fluid and suggests that the location of the leak into the epidural space lies dorsally at the height of C1/2.
It is critical to recognize that contrast at this level is sometimes a false localising sign as contrast ascends the in epidural space to the C1/2 level.
Nonetheless, given that the contrast is most concentrated at this level, and little contrast is seen elsewhere in the epidural space, the cervical dural leak is treated by a CT-guided blood patch as demonstrated above.