The mother of a 4 months old infant reports that he has had 3 to 4 days of constipation. She states that the baby has had difficulty feeding over the past 24 hours and is unable to suck and swallow. She is also worried that he feels limp in her arms and appears to have a very weak cry. What are the most important differential diagnoses?

Of the relevant differential diagnoses, it is important to rule out congenital muscular dystrophy, spinal muscular atrophy, and hypothyroidism.

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This post was written by Omar Rifai