Enterobius vermicularis and Appendicolith Co-occurrence in a Child with Prolonged Postprandial Abdominal Pain: A Case Report
This case report describes an 8-year-old girl with prolonged postprandial abdominal pain and an appendicolith who was found to have concurrent Enterobius vermicularis infestation during appendectomy, highlighting the importance of considering occult parasitic infection in such presentations and recommending meticulous surgical management alongside postoperative anthelmintic therapy for complete resolution.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Inside the human body, the appendix is a small, finger-like pouch attached to the beginning of the large intestine. For decades, doctors have known that this organ can become blocked, often by a hard, stone-like mass of stool called an appendicolith, or by swollen tissue that lines the inside. When this blockage happens, pressure builds up, causing pain and sometimes infection, leading to the common surgical emergency known as appendicitis. In children, another common inhabitant of the gut is a tiny, thread-like worm called the pinworm. These parasites are widespread and usually live harmlessly in the lower intestine, but they can occasionally wander into the appendix. While finding these worms inside an appendix is not unheard of, the question of whether they actually cause the blockage or simply live there by chance has remained a subject of debate. Understanding the relationship between these worms, the hard stones, and the pain they cause is important because it changes how doctors decide to treat a child who is suffering from unexplained belly pain.
In a recent report from a hospital in China, a team of doctors described the case of an eight-year-old girl who brought these questions into sharp focus. She had been experiencing intermittent pain in the lower right side of her abdomen for ten days. What made her case unusual was that the pain always got worse right after she ate, yet she did not have a fever, and standard blood tests showed no signs of infection or inflammation. When doctors scanned her abdomen with a CT machine, they saw a dilated appendix blocked by a calcified stone, but the lack of fever and normal blood work made the diagnosis tricky. Because the pain was persistent and the blockage was clear, the medical team decided to proceed with a minimally invasive surgery to remove the appendix.
During the operation, the surgeons encountered a surprise. As soon as they cut the appendix, six live, white worms, each about the length of a small fingernail, emerged from the opening. These were identified as pinworms. The presence of live parasites inside the organ required the surgical team to act quickly and carefully. They used suction to remove the worms, tied the stump of the appendix twice to ensure nothing could leak out, and washed the area thoroughly to prevent any stray worms from spreading into the abdominal cavity. Once the appendix was removed, a closer look at the tissue revealed that it was inflamed, but the inflammation was a mix of recent activity and long-term changes, with no evidence that the worms had burrowed into the wall of the organ itself. The hard stone that had caused the blockage was also found inside the specimen.
After the surgery, the girl was treated with a medication designed to kill intestinal worms, and her entire family received the same treatment to prevent her from getting reinfected. Three months later, she was completely pain-free, and follow-up tests showed no trace of the parasites. This case highlights a specific scenario where a child has prolonged pain after eating, a blocked appendix, and normal blood work. The doctors suggest that in such cases, the presence of pinworms should be considered as a possible factor, even if the usual signs of infection are missing. While the report does not prove that the worms caused the stone to form, it does show that the two can exist together in a way that creates significant symptoms. The authors also emphasize that when surgeons find live worms during an operation, they must take extra steps to clean the area and tie off the tissue securely to avoid complications. Finally, the case supports the idea that treating the entire household with anti-worm medication is a necessary step to ensure the child does not suffer from the same problem again.
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