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Colonoscopy. A: Two worm-like parasites covering the appendiceal orifice; B: Following removal of the parasites, the appendiceal orifice showed hyperemia and edema; C: Three live parasites were found at the ileocecal-appendiceal orifice; D: Following removal of the parasites, parts of the intestinal wall showed hyperemia and edema, and the mucosa was pale and ischemic.
