“…The patient's age at the time of diagnosis of the associated mass varies, but patients typically present in the first months of life, but MPO has been reported in children up to 5 years old. 6 Meconium is the greenish, viscous intestinal content of the distal small bowel present after the fourth month of fetal life. It contains swallowed amniotic fluid, bile salts, bile pigments, cholesterol, mucin, pancreatic enzymes, intestinal enzymes, squamous cells, lanugo hair and other cellular debris.…”