The findings are most consistent with either meconium ileus or jejunoileal atresia. Meconium ileus might be the favored diagnosis because of the multiple filling defects. However, at surgery, mid/distal ileal atresia was confirmed. 

It is important to remember that jejunoileal atresia is an acquired in-utero phenomenon secondary to ischemia/infarction and therefore, depending on when it occurs, meconium may have passed into the colon.