Enterobius vermicularis in appendectomy specimens; Clinicopathological assessment: Cross sectional study

Abstract

Background This study identifies the incidence of appendiceal Enterobius vermicularis (E.v) infestation in all the patients undergoing appendectomy and evaluates the relationship between E. v infestation of the appendix and the acute appendicitis. Method ology: All the routinely examined appendectomy specimens received in the pathology laboratory of a referral hospital over a three year period of time were reviewed for the existence of E. v. These cases were evaluated for clinico-laboratory characterization. Results Out of 1150 appendectomies for clinical acute appendicitis picture, 31 (2.7%) cases revealed E. v infestation. The age ranged from 6 to 42 years old but more than 80% of the E. v infected cases were children. Twenty four cases (77.4%) did not show any other appendiceal pathology, six cases showed lymphoid hyperplasia and only one case showed concomitant histological acute inflammatory process. Conclusion E. v infestation is an incidental finding during histopathology examination of appendectomy specimens for patients with clinical diagnosis of acute appendicitis, however there is no relation between the existence of E. v and occurrence of acute appendicitis which is the main indication for appendectomy, so further studies are recommended to reach out earlier diagnosis to eliminate the unnecessary surgical intervention. Also surgeons should consider E. v as a differential diagnosis when removing a normal looking appendix to take the necessary precautions for minimizing any chance of contamination and sending all the normal looking appendectomy specimens for histopathology examination.

Acute appendicitis caused by Enterobius vermicularis: Observations from a case report

“…Enterobius vermicularis infection, a nematode worm of the class Secernentea known as pinworm, is the most common parasitic infection affecting about 200 million people worldwide [ 1 ]. It has a pervasive distribution including developed countries but is mainly prevalent in tropical developing countries [ 2 ].…”

The predictive value of nasolacrimal sac biopsy in endoscopic dacryocystorhinostomy

“…Histopathological examination can specify the nature and severity of different inflammatory lesions [ 31 , 32 ], our findings of nasolacrimal duct biopsy in this study according to CIS grading was presented as inflammatory cellular infiltrates that was found in 56%, 30% & 14% in mild, moderate & severe CIS score, respectively. Fibrosis was found in 18%, 20% & 62% in mild, moderate & severe CIS score, respectively.…”

A Rare Cause of Acute Appendicitis: <i>Enterobius vermicularis</i>

“…The role of E. vermicularis in the cause of acute appendicitis remains controversial. Appendectomy alone is not an adequate treatment for patients whose appendectomies are found to contain E. vermicularis since surgery cannot eliminate the cause and will result in only one condition, anti-helminthic drugs should be recommended to patients after surgery (14,18). In conclusion, it is reported that inflammatory changes are rare in cases where parasite is detected in the appendix lumen (5,10).…”