Ming-Yan Cai, MD, from the Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China, presents this video case.

During a regular EGD exam, using a magnifying scope with narrow-band imaging (NBI) function, we observed a very interesting pattern of Ancylostoma duodenale. A male worm was coiled around a female one and the head of female worm was attached to the intestinal wall. It was very interesting to view the biological behavior of Ancylostoma duodenale in the duodunem. A direct diagnosis of hookworm infection was confidently made by viewing this pattern.

High-resolution magnifying endoscopy with water-immersion technique can provide an ideal visualization of duodenal mucosa.

Figure 1. A, EGD view showing several red short worms in the duodenal bulb. B, Narrow-band imaging and magnification showing a male worm coiled around a female worm.

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