Abdominal pain is a usual reason for consultation in pediatric, both in primary care and hospital, including emergency service. When the pain is located in right lower quadrant, the first diagnosis to discard is acute appendicitis. Besides, the relevance of ultrasonography for diagnosis of abdominal pain is emphasized. We report a case of abdominal pain located in right lower quadrant, where, after discarding acute appendicitis with an abdominal ultrasonography, we discover an Ascaris lumbricoides infestation, which is an unusual cause of abdominal pain in our country.

Intestinal perforation with secondary peritonitis caused by Ascaris lumbricoides is rare in our environment. This entity should be taken into consideration in patients who come from endemic areas, and who have suggestive clinical manifestations. We report a case of a Rumanian girl with 15 days of fever, stomach pains and vomiting. Imaging studies evidenced abdominal collections in which Ascaris lumbricoides infestation was found through laparoscopic surgery.