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Ultrasound images of the urinary bladder in S. haematobium egg-positive Sudanese with the echogenic snow sign (arrows), wall thickening, and/or mass: (A) 14-year-old boy; (B) 18-year-old girl; (C) 20-year-old man; (D) 6-year-old girl; (E) 5-year-old-girl.
