Complicated mumps viral infection: an unusual presentation affecting only submandibular gland.

This case is a single submandibular gland mumps viral infection patient without parotid gland involvement who developed complications of meningitis and orchitis. Since spontaneous remission is common in mumps viral infection, missing opportunities for exact diagnosis is frequent. As in this case, single submandibular glands infection without parotid gland involvement not only delays diagnosis but also increases risk of developing complications. This case instructs us that despite the atypical manifestation, the clinician should suspect mumps and conduct serologic tests for diagnosis while observing for complications such as meningoencephalitis and orchitis.