To evaluate the intracranial inflammatory response in patients with acute-stage KD, we measured the levels of cytokines (interleukin [IL]-6 and tumor necrosis factor [TNF]-α) and pentraxin-3 (PTX3) in the cerebrospinal fluid of patients with KD (<i>n</i> = 7) and compared the levels to those of the age- and sex-matched febrile control patients (bacterial meningitis [<i>n</i> = 5], enteroviral meningitis [<i>n</i> = 10], nonspecific viral illness without central nervous system involvement [<i>n</i> = 10]).