While there have been several reports of cases of perforation of the vermiform appendix by roundworm, these accidents, are yet quite rare. The pathologic development of these cases, of course, varies, but as a rule it is believed—and with good reason—that the worm, finding itself shut in so narrow and blind a canal, bores through in its endeavor to escape. Once in the peritoneal cavity, the worm offers to the peritoneum a twofold insult, mechanical and bacteriologie. Outside of its normal habitat the worm soon dies and is walled off by adhesions. If all goes well, a well-circumscribed abscess surrounds the worm.
In the case I have to report the worm failed to get entirely through his own tunnel and probably died as a result of the constriction which took place around his neck, so to speak. In the Museum of the Royal College of Physicians and Surgeons, Lincoln's Inn