Invasion of the Fallopian tube by Enterobius vermicularis

A solitary granuloma containing a gravid female pinworm was incidentally found in the fallopian tube of a 27 year old woman. On rare occasions, pinworms have been found outside the gastrointestinal tract, most frequently in the peritoneal cavity. The reported cases have been found at all levels of the female reproductive tract from the introitus to the fallopian tube. Thus, the hypothesis is supported that the worms reach the pelvic cavity via the genital tract. In addition, pinworm granulomas have also been found in the liver, lung, prostate and the renal pelvis. Awareness that such lesions may occur is important since the lesions may be interpreted as being malignant with subsequent unnecessary surgical intervention.