<prompt> A child is passing blood with act of defecation. The probable diagnosis isJuvenile rectal polypAdenomatous PolyposisRectal ulcerPost Surgery  <response>: Ans. a Juvenile rectal polypRef : Bailey Love 26th ed. 1224The most common cause of bleeding per rectum in children is juvenile rectal polyp up to adolescence age. Though in infants and young children up to 1 yrs the cause is anal fissure. 