Clinical and neurochemical characteristics of pediatric multiple sclerosis - CSF analysis as knowledge base for differential diagnosis and pathophysiology.

Multiple sclerosis (MS) is the most common chronic inflammatory disease of the central nervous system affecting young adults. Although adults and children share important features of the disease, they also differ in some clinical, radiological and laboratory aspects. This review focuses on the neuroimmunological findings in the cerebrospinal fluid of children with MS pointing out that there is already at earliest time of clinical manifestation a neuroimmunological pattern, which differs only in intensity of the humoral immune response but not in frequency and does not support a neuroimmunological difference between early onset from adult onset MS. The humoral immune response with intrathecal IgG and IgM class response and the polyspecific production of antibodies against a wide range of antigens (MRZ antibody response) further helps to differentiate childhood MS from ADEM as the main differential diagnostic challenge.