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Pediatrics clinical presentation

Developmental Delay: Differential Diagnosis

Developmental Delay is a high-yield pediatrics presentation. Learners should reason from acuity and pattern recognition to a prioritized differential, targeted investigations, and first safe management steps.

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Differential Diagnosis

  • global developmental delay
  • autism spectrum disorder
  • hearing/vision impairment
  • genetic/metabolic disorder
  • environmental deprivation
  • infection
  • trauma
  • congenital condition

Red Flags And Exam Traps

Red flags

  • - developmental regression
  • - seizures
  • - loss of milestones
  • - micro/macrocephaly
  • - feeding failure

Common exam traps

  • - waiting to see without referral
  • - missing hearing loss
  • - missing regression as urgent

Exam Mapping

MCCQE

  • - clinical presentation approach
  • - differential diagnosis
  • - investigation selection
  • - initial management and disposition

MCAT

  • - organ-system mechanism
  • - foundational physiology
  • - pathophysiology vocabulary
  • - data interpretation from clinical context

USMLE Step 1

  • - pathophysiology mechanisms
  • - classic and atypical findings
  • - test interpretation
  • - mechanism of therapy

USMLE Step 2 CK

  • - diagnostic next step
  • - initial management
  • - risk stratification
  • - emergency recognition

FNP

  • - primary care differential
  • - initial workup
  • - prescribing and monitoring
  • - follow-up and referral

AGPCNP

  • - adult/geriatric differential
  • - comorbidity-aware workup
  • - medication safety
  • - follow-up thresholds

PMHNP

  • - medical mimic screening
  • - mental status impact
  • - medication/substance contributors
  • - safety escalation

Respiratory Therapy

  • - respiratory red flags if present
  • - oxygenation impact
  • - ABG relevance when unstable
  • - escalation communication

Learning Assets

Developmental Delay: presentation approachBuild the first-pass problem representation and acuity screen.Developmental Delay: differential diagnosisSeparate life threats, common causes, and exam distractors.Developmental Delay: investigationsChoose tests based on pretest probability, acuity, and patient safety.Developmental Delay: management prioritiesPick the next safest action and disposition.

Flashcards

  • What is the first safety screen in developmental delay?developmental regression; seizures; loss of milestones
  • Name three high-yield causes of developmental delay.global developmental delay; autism spectrum disorder; hearing/vision impairment
  • Which investigation anchors the initial developmental delay workup?standardized developmental screening

Practice Questions And Cases

A learner is evaluating a patient with developmental delay. Which finding should most strongly shift the next step toward urgent escalation?

Create a problem representation, rank the differential, choose the first investigation, and state the immediate management priority.

Image Recommendations

  • - Developmental Delay differential diagnosis flowchart
  • - Developmental Delay red-flag triage checklist
  • - Developmental Delay investigation pathway diagram
  • - Developmental Delay management-priority algorithm

Internal Links

Symptom pageDifferential pageInvestigation pageManagement pageFeverRashLimp