CXCL13 and erythema multiforme: In our present study, all children in the possible LNB group with elevated CXCL13 had pleocytosis with mononuclear dominance suggestive for LNB [27] and, in a majority of cases, facial nerve palsy and/or anti-Borrelia antibodies in serum and/or EM/ Borrelia lymphocytoma.