Ultrasonographic diagnosis of intestinal ascariasis.

Ascaris lumbricoides is the most common roundworm in warm and temperate areas. Although radiological features of Ascaris lumbricoides are well defined, there are only a few reports on the ultrasonographic findings of intestinal ascariasis. In our two patients with no acute abdominal symptoms, intestinal ascariasis was initially diagnosed by abdominal ultrasonography. In both patients, tubular structures in the segments of the small intestine were demonstrated by ultrasonography.