<unk>  is the triad of nuchal rigidity, photophobia (intolerance of bright light) and headache. It is a sign of irritation of the meninges, such as seen in meningitis, subarachnoid hemorrhages and various other diseases.<unk> us" is the term used when the above listed symptoms are present without actual infection or inflammation; usually it is seen in concordance with other acute illnesses in the pediatric population.
Meningism
Meninges
Meningitis
Neoplastic meningitis
Encephalitis
Cerebral vasculitis
Brain abscess
Lymphocytic choriomeningitis