A neonate is brought with history of not having passed meconium. On examination there is no anal opening but a dimple. Investigation of choice would be?: (A) X-ray in erect posture, (B) MRI study, (C) CT Gastrograffin study, (D) Inveogram
Answer is B. MRI, due to excellent inherent soft tissue contrast,is best to define the relationship of the atretic segment to the levator ani pelvic sling and the integrity of sphincters and their nerve supply (anorectal malformation).