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Medical Science Monitor Basic Research


Colonic Polyps an Unusual Manifestation of Schistosomiasis

Challenging differential diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis), Rare coexistence of disease or pathology

Ali Mothanna Al-Zubaidi, Galal Ahmed Bashanfer, Mashhour H. Alqannas, Abdullah Suliman Al Atawi

Saudi Arabia Department of Medicine, Endoscopy Unit, King Khalid Hospital, Najran, Saudi Arabia

Am J Case Rep 2020; 21:e923177

DOI: 10.12659/AJCR.923177

Available online: 2020-06-23

Published: 2020-08-07


BACKGROUND: Although reports of bilharizial colonic polyps are very rare in the literature, we report a case of a large rectal polyp as a manifestation of chronic intestinal bilharzia. A high index of suspicion in an endemic area is the key factor to avoid unnecessary medical interventions.
CASE REPORT: We report a case of a 24-year-old male patient who was married, born in Taiz North Yemen, and worked as a military soldier. He presented to our clinic with a complaint concerning intermittent lower abdominal pain and several months of rectal bleeding. A colonoscopy was performed at the Endoscopy Unit of King Khalid Hospital, Najran, Saudi Arabia on September 23, 2019 and results showed 2 large rectal polyps, (measuring 4×3 and 2×3 cm), located 10 cm from the anal verge, having wide bases and irregular surfaces that mimicked dysplastic polyps. Both polyps became elevated after a normal saline/methylene blue injection. An endoscopic mucosal resection was successfully performed with no immediate complications. The histopathology showed benign polyps due to Schistosoma-induced colonic infection.
CONCLUSIONS: It is very difficult and challenging to differentiate Schistosoma-induced colonic polyps from other colonic polyps even with an endoscopic evaluation; thus, a high index of clinical suspicion is required mainly in an endemic area, which may prevent the physician from ordering unnecessary interventions and thus avoid severe complications.

Keywords: colonic polyps, Schistosoma, Schistosoma mansoni