1. Department of Pediatric Surgery, Federal University of Paraná—Rua Padre Camargo, Curitiba, Parana, Brazil
2. Department of Neurosurgery, Federal University of Paraná—Rua Padre Camargo, Curitiba, Parana, Brazil
3. Hospital de Clínicas and Medical School, Federal University of Paraná—Rua Padre Camargo, Curitiba, Parana, Brazil
4. Department of Radiology, Federal University of Paraná—Rua Padre Camargo, Curitiba, Parana, Brazil
5. Gastrointestinal Endoscopy Unit, Federal University of Paraná—Rua Padre Camargo, Curitiba, Parana, Brazil