Question
A term newborn presents with a progressively increasing head size at the 5th week of postnatal life with no significant perinatal history.O/E, the head circumference was 39cm, fontanelle was bulging and wide open with pulsations. What is the most likely etiology for this underlying condition:
| A. |
Congenital CMV infection
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| B. |
Congenital toxoplasmosis
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| C. |
CNS malformations
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| D. |
Choroid plexus papilloma
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Show Answer
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Correct Answer � C
Explanation
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Ans. C. CNS Malformations
Progressively increasing head size, 39cm at 5th week, and the clinical signs indicate congenital hydrocephalus.CNS malformations like Arnold Chiari malformations, aqueductal stenosis, and associated neural tube defects are common causes of hydrocephalus in infants
Obstructive ( non communicating) type is more common than communicating hydrocephalus
In a preterm child, post hemorrhagic hydrocephalus is common
Other common causes include intrauterine infections like toxoplasmosis, CMV etc
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