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Mansonian schistosomiasis in rectum - Report of a case -
So Dug Lim,1Yeon-Lim Suh,2Je G Chi,*1Sung-Tae Hong,3 and Soon-Hyung Lee3
1Department of Pathology, Seoul National University College of Medicine, Korea.
2Department of Diagnostic Pathology, Samsung Medical Center, Korea.
3Department of Parasitology, Seoul National University College of Medicine, Korea.
Received November 20, 1995; Accepted December 01, 1995.
Abstract
Schistosomiasis is a snail-transmitted trematodiasis acquired by immersion in water which contains the cercariae. In Korea, six imported cases of urinary schistosomiasis by Schistosoma haematobium and one case of imported cerebral schistosomiasis by S. mansoni were reported. Herein we report a case of S. mansoni infecting rectum of a 46 year-old Korean male, who had been to Saudi Arabia for two years. On colonoscopy for routine physical check up, a 0.4 cm polyp in the rectum was detected and biopsy was done. Microscopically, rectal mucosa showed several granulomas which were composed of macrophages, lymphocytes, neutrophils and eosinophils. The center of each granuloma showed an ovoid egg often containing miracidium. The eggs measured 130 × 60 µm in average size. They had yellowish-brown transparent shell with the characteristic lateral spine. This is the 8th imported case of schistosomiasis in Korea and the second one infected by S. mansoni.
Figures
Fig. 1 Colonoscopic examination revealed a 0.5 cm polyp (arrow) in the rectum.
Fig. 2 Microscopically the rectal mucosa is chronically inflamed and contains a focus of egg granuloma (arrow), original magnification, × 100.
Fig. 3 Close up view of S. mansoni eggs, one egg shows a characteristic lateral spine of the shell (arrow) and miracidium in the center, original magnification, × 400.
Tables
Table 1 Summary of imported schistosomiasis in Korea
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