ABSTRACT                                                              severity of both ASD and ADHD and Neopterin level.
 
Various genetic, psychologjcal, social, environmental and biochemical factors are thought to be involved in the etiopathogenesis of ADHD and ASD.
Central nervous system and immune system are systems which are in interaction with each other . The cellular immunity may
contribute  to  the  development  of  the
disorder via affecting the brain cell functions.
High  levels  of  neopterin  are  a  well­
established marker of immune activation, consistent with heightened cell-mediated immunity.
We evaluated serum Neopterin as  a
 
KEY WORDS: Asp, ADHD, Neopterin