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I can not distinguish among these two conditions as both can cause intestinal obstruction and are caused by impacted meconium.:confused:
 

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meconium ileus occurs in babies with cystic fibrosis and may be complicated by intestinal perforation. meconium plug has similar presentation but not in cystic fibrosis babies and not complicated by intestinal perforation:happy:
 

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Both are found in Cystic fibrosis,

E Medicine

Presentation

Clinically, the hallmarks of the disorder are abdominal distention and failure to pass significant meconium in the first 24 hours of life. Bilious vomiting may occur.4 Symptoms often are present before the first feeding, which helps distinguish the disorder clinically from necrotizing enterocolitis.
The incidence is increased in premature infants of diabetic mothers (especially the small left colon variant) and in infants whose mothers received magnesium sulfate for treatment of toxemia. Newborns with cystic fibrosis also may present with meconium plug syndrome, although meconium ileus is more frequent and characteristic in these patients. Despite these associations, many patients have no apparent risk factor.
http://emedicine.medscape.com/article/410969-overview

I would never a limit a definition to just one syndrome. You need to remember all presentations to navigate the exam. :happy:
 
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