Ovarian enterobiasis: a case report

Geethu G. Nair, Prejisha Balan


Enterobius vermicularis (the pinworm) is the most common intestinal nematode in gastrointestinal tract of humans. It commonly infests the lumen of the intestine but on rare occasions has been found in the wall or in the tissues outside the gastrointestinal tract; female genital tract and peritoneum being the commonest sites. It is usually seen as an incidental finding. This is a case of 29-year-old female presented for elective sterilization. A tiny nodule was noted on the surface of ovary during procedure which was sent for histopathological examination. Lesion was composed of necrotic areas and inflammatory cells with cross section of a degenerated worm. The features of the eggs were diagnostic of Enterobius vermicularis. Multiple histologic sections may be required to establish diagnosis in older lesions as in this case.


Enterobius vermicularis, Ovarian enterobiasis, Pinworm

Full Text:



Mcdonald GSA, Hourihane B. Ectopic Enterobius vermicularis. Gut. 1972;13:621-6.

Powell G, Sarmah P, Sethi B, Ganesan R. Enterobius vermicularis infection of the ovary. BMJ case reports. 2013;2013:bcr2013201146.

Ondič O, Neubauer L, Sosna B. Extraintestinal oxyuriasis-report of three cases and review of literature. Cesk Patol. 2014;50(3):152-4.

McCabe K, Nahn PAK, Sahin AA, Mitchell MF. Enterobiasis of the ovary in a patient with cervical carcinoma in situ. Infect Dis Obstet Gynecol. 1995;2(5):231-4.

Hong ST, Choi MH, Chai JY, Kim YT, Kim MK, Kim KR. A case of ovarian enterobiasis. Korean J Parasitology. 2002;40:149-51.

Pampiglione S, Rivasi F. Enterobiasis in ectopic locations mimicking tumor-like lesions. International J microbiology. 2009 Jun 14;2009.

Tandan T, Pollard AJ, Money DM, Scheifele DW. Pelvic inflammatory disease associated with Enterobius vermicularis. Archives of disease in childhood. 2002;86(6):439-40.

McMahon JN, Connolly CE, Long SV, Meehan FP. Enterobius granulomas of the uterus, ovary and pelvic peritoneum. Two case reports. BJOG: An Inter J Obstetrics Gynaecol. 1984;91(3):289-90.

Zahariou A, Karamouti M, Papaioannou P. Enterobius vermicularis in the male urinary tract: a case report. J Med Case Reports. 2007;1:137.

Cateau E, Yacoub M, Tavilien C, Becq-Giraudon B, Rodier MH. Enterobius vermicularis in the kidney: an unusual location. J Med Microbiol. 2010;59(7):860-1.