RESUMEN
To evaluate the appendicitis due to Enterobius vermicularis. Appendices were removed and histopathological examination was carried out. The samples were obtained from patients admitted in Imam khomeini hospital at Ahvaz city, capital of Khouzestan Province, Southwestern part of Iran. 1253 appendices were examined in order to elucidate possible relationship between the incidence of Enterobius vermicularis and the origin of inflammation.Main outcome: Assesment of the appendicitis due to Enterobius vermicularis. Nine out of 1253 cases [0.7%] were infected with Enterobius vermicularis, including 5 female and 4 male at the age of 8-36 years. During the operation in two female cases, ovarian cysts were revealed at the same time. Existence of Enterobius vermicularis in appendicitis can cause the symptom and even inflammation of appendicitis