“…8,9 Several viral candidates have been proposed, including cytomegalovirus (CMV), Epstein-Barr virus (EBV), herpes virus 6 and 8, varicela zoster virus, parainfluenza virus, parvovirus B 19, myxovirus, 6 rubella, 10 Toxoplasma and Yersinia also have been reported as possible causative agents. 6,8,15,16,20 However, serologic and molecular studies have failed to link KFD to a specific pathogen 6,9 because several other studies that, by using the same and other molecular pathology procedures to localize the virus genome, have concluded that neither EBV nor herpes virus 6 or 8 has a putative role in the pathogenesis of KFD. 8,21 Chan et al 22 reported that, there is probably no one single cause for this lesion, and it is probably a hyperimmune reaction to different etiological agents, be it microbial, chemical, physical or neoplastic.…”