Autism Spectrum Disorder (ASD) is characterized by limited, repetitive patterns of behavior, lack of interest, lack of activity, lack of communication and social interactions. Population studies show that the incidence of autism worldwide is steadily increasing. The review was based on literature research. It was analyzed 40 positions in bibliography according to gastrointestinal disorders in ASD. Clinical manifestations of gastrointestinal diseases in children with autism spectrum disorders may be different from neurotypical children. Most of the evidence suggests that gastrointestinal dysfunction is more common in ASD children than in the typically developing group. Diagnosis of gastrointestinal disorders in an autistic group of patients may be complicated and delayed. An important problem is their diagnosis, as most patients with autism are unable to inform their parents and/or carers about the suffering of abdominal pain or discomfort caused by bowel dysfunction. These symptoms may be a change in behavior: hyperactivity, anxiety, aggression, self-mutilation. Presence of gastrointestinal disorders raises the question of their possible association with the severity of symptoms of autism.
Keywords: autism spectrum disorders; gastrointestinal disorders.
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