Similar to our results, Jönsson et al. found downregulated levels of chemokines and cytokines CTACK and IL-13 in CSF of patients with neuropathic pain compared with controls.6 Conversely, increased CSF cytokines have been found in patients with radiculopathy and injury of a nerve root by the same group.2 However, in the latter study, the authors used an essay that measured only proteins, whereas our essay measured transcription and proteins. Here, CCL27 is linked to radiculopathy.