A recent meta-analysis showed that there is increased systemic inflammation in patients with Parkinson’s disease, which is closely related to DLB.8 It is therefore likely that the neuroinflammatory processes occurring in AD are also involved in driving neurodegeneration in DLB, with cytokines such as interleukin (IL)-1 being implicated in the neuropathological changes characteristic of both conditions.9 Here, IL1B is linked to Parkinson disease.