CD40LG and sialadenitis: Interestingly, besides the small number of case reports describing the development of peripheral facial paralysis in patients with mumps sialadenitis, the association of trigeminal herpes zoster and mumps parotitis has also been reported [11], as well as an increasing titer of mumps IgM in clinically diagnosed cases of Ramsay Hunt syndrome (without clinical sialadenitis) [12].