A. Akere1, A.O. Oluwasola2, T.O. Fakoya1 and A. Lawan2
- Department of Medicine, College of Medicine, University of Ibadan/University College Hospital, Ibadan, Nigeria.
- Department of Pathology, College of Medicine, University of Ibadan/University College Hospital, Ibadan, Nigeria.
Intestinal Schistosomiasis is a serious disease and is commonly produced by S. mansoni and japonicum . The presence of viable ova of the organism in the colon elicits inflammation, formation of granuloma, ulcers, haemorrhage and colonic fibrosis with subsequent longterm sequelae. Schistosoma mansoni is endemic in the Middle East, Africa, Central and South America. This is a case of a Nigerian with colonic polypoid masses which turned out to be Schistosomal mansoni infection.
Keywords: Colonic polypoid masses, Schistosoma mansoni, Nigerian patient
Dr. A. Akere
Dept. of Medicine,
College of Medicine,
University of Ibadan/
University College Hospital,
P.O. Box 28829, Agodi, Ibadan
There are five species of Schistosoma that cause human Schistosomiasis. These are the intestinal species: Schistosoma mansoni, japonicum, mekongi and intercalatum, and the urinary species: Schistosoma haematobium1. Infective cercariae released from infected freshwater snails initiate human infection through penetration of intact skin. Sexually mature worms then migrate to the venous system of the intestine (for the intestinal species) or urinary bladder (for the urinary species) where ova are deposited.1
About 200-300 million individuals are thought to be infected in the Caribbean, South America, Middle East, Africa and Southeast Asia. Schistosoma mansoni is endemic in the Middle East, Africa, Central and South America, while S. japonicum is common in the Philippines, Thailand and China. Schistosoma intercalatum is found mostly in Africa.2
Schistosomiasis is a serious disease. Intestinal disease is commonly produced by S. mansoni and japonicum. Viable ova of the organism in the colon produce inflammation, formation of granuloma, ulcers, haemorrhage and colonic fibrosis with subsequent long term sequelae.3
A colonic polyp represents a mass of tissue protruding into the colonic lumen. The two major groups of colonic polyps are, the neoplastic (benign and malignant) and the non-neoplastic (hyperplastic, Peutz- Jeghers and inflammatory). Although, majority of patients with colonic polyps are asymptomatic, some patients may present with occult or overt lower gastrointestinal bleeding, flatulence, diarrhea and constipation.4
Severe colitis arising from amoebic or bacterial dysentery, Crohn’s disease and ulcerative colitis may produce inflammatory polyps.5,6 Similar polyps which are made of eggs, adult worms and granulation tissue can also arise as a result of chronic schistosomiasis.7
Here, we present a case of a Nigerian with colonic polypoid masses which turned out to be Schistosomal mansoni infection.