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Difficulty: MediumPediatric Neurologic Disorders

An 8-month-old male infant presents for a routine wellness examination accompanied by his parents. The family is anxious because the child is not yet walking on his own and has not started speaking in two-word sentences. Upon physical evaluation, the clinician notes that the infant exclusively uses his right hand to grasp objects while keeping his left hand tightly clenched. Neurological assessment demonstrates increased muscle tone and hyperactive deep tendon reflexes in the left upper and lower extremities. A review of his past medical history reveals he was delivered prematurely at 29 weeks of gestation. The clinician suspects spastic hemiplegic cerebral palsy. Which of the following statements regarding this patient's clinical presentation and appropriate management are correct? (Select 2)

  1. Magnetic resonance imaging of the brain is the preferred modality to identify the underlying structural etiology.Answer
  2. B
    The infant's inability to speak in two-word phrases indicates an expressive language delay requiring intervention.
  3. C
    The early right-hand preference is a reassuring sign indicating appropriately advanced fine motor development.
  4. The infant's inability to walk independently at 8 months of age is an age-appropriate physiological finding.Answer
  5. E
    The infant should not receive live-attenuated vaccines such as measles, mumps, and rubella (MMR) due to his underlying condition.

Answer

The preferred initial neuroimaging is an MRI of the brain, and the infant's inability to walk independently at 8 months is a normal developmental stage.
Magnetic resonance imaging (MRI) of the brain is the diagnostic test of choice in patients with suspected cerebral palsy to identify structural abnormalities such as periventricular leukomalacia, which is especially common in premature infants. Additionally, while the parents are concerned about the child's inability to walk independently, this is an entirely age-appropriate finding; independent ambulation is typically achieved between 12 and 15 months of age.

Step-by-Step Solution

1
Analyze the patient's neurological signs and birth history.
The infant was born prematurely and exhibits asymmetric tone, hyperreflexia, and early handedness (fisting of the left hand), pointing toward spastic hemiplegic cerebral palsy.
Recognizing the classic presentation of cerebral palsy is essential to determine the next steps in management.
2
Evaluate the parental concerns regarding the child's developmental milestones.
The inability to walk and the absence of two-word phrases are normal findings for an 8-month-old infant.
It is critical to distinguish between normal physiological development and true developmental delay to provide accurate parental reassurance.
3
Determine the appropriate diagnostic evaluation for the suspected condition.
A brain MRI is indicated to identify structural brain lesions such as periventricular leukomalacia.
MRI is the preferred imaging modality for confirming the etiology of suspected cerebral palsy in infants and children.

Key Concept

Early recognition of cerebral palsy and differentiation of pathological motor asymmetry from normal developmental milestones.
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Topics

Pediatric Neurologic Disorders

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