Question

Difficulty: Very hardNormal Growth and Development

A primary care physician is reviewing developmental screening profiles for several pediatric patients. Match each patient's clinical presentation with the most appropriate interpretation and next step in management.

  • A ten-month-old infant who consistently reaches for objects exclusively with the left hand.Suspect contralateral upper motor neuron lesion; perform detailed neurological examination.
  • A two-and-a-half-year-old toddler who uses forty individual words but does not combine them into phrases.Suspect expressive language delay; refer for comprehensive speech-language and audiologic evaluation.
  • An eighteen-month-old toddler who uses a cup and spoon but is unable to kick a ball forward.Provide reassurance; expect this gross motor skill to emerge around the second birthday.
  • A four-year-old child who successfully copies a cross but is unable to copy a triangle.Provide reassurance; expect this visuomotor skill to develop around the fifth birthday.
  • A twelve-month-old infant who pulls to stand but is unable to walk independently.Provide reassurance; independent ambulation may normally emerge up to fifteen months of age.

Answer

Match the abnormal milestones to immediate investigations (early handedness to neuro exam, delayed phrases to speech evaluation) and the expected absent milestones to reassurance based on normal chronological emergence limits.
Each clinical presentation must be accurately mapped to specific age thresholds. Early handedness indicates hemiplegia; absent phrases at two-and-a-half years is a definitive language delay. In contrast, drawing triangles, independent walking, and kicking a ball have later maximum threshold ages, making their absence normal for the specified ages.

Step-by-Step Solution

1
Evaluate the ten-month-old for early handedness.
Identified as a red flag.
Hand dominance before eighteen months suggests weakness in the contralateral limb, prompting a neurological exam.
2
Assess the language development of the two-and-a-half-year-old.
Identified as a language delay.
Children should speak in two-word phrases by their second birthday; absence at two-and-a-half years requires referral.
3
Analyze the gross motor skill of the eighteen-month-old.
Identified as normal development.
Kicking a ball is a milestone for two years of age, so its absence at eighteen months is appropriate.
4
Review the visuomotor skills of the four-year-old.
Identified as normal development.
A four-year-old should copy a cross; copying a triangle is a five-year-old milestone.
5
Examine the motor milestones of the twelve-month-old.
Identified as normal development.
Walking independently is expected by fifteen months, so a twelve-month-old who only pulls to stand is within normal limits.

Key Concept

Differentiation between normal developmental variations and critical pediatric red flags across motor and language domains.
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