A mother brings her 2-year-old son to the hospital because she has seen drops of blood in his diaper with each stool and with wiping over the last two days. The child is eating his regular diet, including milk each day. He has been afebrile with no vomiting or diarrhea. The mother has noted he cries while stooling.
Examination of the abdomen is normal On inspection of the rectal area, the attending doctor finds a 7-mm linear split in the posterior midline traversing from the anocutaneous junction to the dentate line. There is also a small skin appendage in the same area. What is the likely diagnosis? (Answer is posted in the comment section below!) *This case is from the Editorial team of Docplexus and is meant for educative purposes only.