Gustatory rhinorrhea after radical parotidectomy

A man of 63 developed unilateral gustatory rhinorrhea shortly after radical parotidectomy for infiltrating squamous cell carcinoma that had metastasised to the parotid lymph nodes. There is a similarity between this condition and the gustatory vasodilatation and sweating of Frey's syndrome, but despite circumstantial evidence that misdirected nerve regeneration causes these symptoms, their exact aetiology is still unknown.