Intestinal ascariasis at pediatric emergency room in a developed country

Figure 1 Abdominal ultrasound examination at the pediatric emergency room. A: Ultrasonography shows multiple, round-shaped structures with a target-like appearance within the small intestine (white arrows); B: In a longitudinal scan of the small intestine, ultrasound shows a tubular structure with two parallel, outer high echogenic lines (black arrows). Space between the intestinal wall and the tubular structure was not observed.

Figure 2 Abdominal ultrasound examination on the day after admission. The tubular structure in the patient’s small intestine was still observed. An ultrasound examination shows a space between the intestinal wall and the tubular structure, and fluid could pass through this space.

Figure 3 Capsule endoscopy. Capsule endoscopy shows a single roundworm moving in the jejunum. There appears to be more than one worm body. However, movement of each part of a body able to be visualized was coordinated. A single worm of Ascaris infection was diagnosed.

Figure 4 Excreted Ascaris lumbricoides after treatment. A single worm of Ascaris lumbricoides was excreted the day after treatment of pyrantel pamoate. The worm length was approximately 20 cm.