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Fig. 3 —Drawings show grading system for intussusception: 0 = no intussusception; 1 = intrarectal intussusception (minimal infolding of part of rectal wall or circumferential infolding that remains intrarectal); 2 = intraanal intussusception (when leading edge of intussusception is intraanal, into orifice of anal canal); and 3 = extraanal intussusception (protruding out of anal canal). Patients with rectal prolapse (grade 3 intussusception) were excluded from this study. (Reprinted with permission from [16])