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Difficulty: MediumPediatric Neurologic Disorders

A 15-month-old girl is brought to the pediatric clinic for a 2-day history of low-grade fever, mild cough, and clear rhinorrhea. Her temperature is 37.8°C (100.0°F), and her respiratory rate is 24/min. Lung auscultation reveals transmitted upper airway sounds but no true wheezing or crackles. During the visit, her mother expresses deep concern that the child is developmentally delayed because she only speaks three words and cannot yet run.

Physical examination reveals an active, well-appearing toddler. Skin examination shows eight flat, uniformly hyperpigmented macules measuring 1 to 2 cm in diameter scattered across her chest and back, along with distinct clustering of freckles in both axillae. Neurologic examination shows normal muscle tone and strength. She is able to walk independently and uses a neat pincer grasp to pick up small objects.

Which of the following is the most appropriate next step in the comprehensive management of this patient?

  1. A
    Referral to early intervention services for developmental delay
  2. B
    Prescription of oral amoxicillin for the respiratory symptoms
  3. C
    Topical antifungal therapy for the cutaneous lesions
  4. Referral for a comprehensive ophthalmologic examinationAnswer
  5. E
    Initiation of a daily inhaled corticosteroid and as-needed short-acting beta-agonist

Answer

Referral for a comprehensive ophthalmologic examination
This patient meets the clinical diagnostic criteria for Neurofibromatosis type 1 (NF1) by presenting with more than six café-au-lait macules greater than 5 mm in diameter and distinct axillary freckling (Crowe sign). Patients with NF1 are at significantly increased risk for central nervous system tumors, particularly optic pathway gliomas. Because these gliomas can cause irreversible vision loss and may be asymptomatic in their early stages, it is standard of care for all children diagnosed with NF1 to undergo regular comprehensive ophthalmologic examinations starting in early childhood. The patient's upper respiratory symptoms are consistent with a viral infection requiring only supportive care, and her developmental milestones are entirely appropriate for her age of 15 months; therefore, the most appropriate active management step is to initiate proper NF1 screening.

Step-by-Step Solution

1
Evaluate the cutaneous findings.
The presence of eight large café-au-lait macules and axillary freckling clinically confirms the diagnosis of Neurofibromatosis type 1 (NF1).
NF1 is diagnosed clinically when a patient meets two or more specific criteria, which this patient does.
2
Determine the necessary screening for a new NF1 diagnosis.
Children with NF1 are at high risk for optic pathway gliomas.
Routine comprehensive ophthalmologic examinations are required because early detection prevents irreversible vision loss.
3
Assess the acute symptoms and developmental concerns.
The respiratory symptoms indicate a viral upper respiratory infection, and the developmental milestones are normal for a 15-month-old.
Identifying that these findings are benign or age-appropriate prevents the initiation of unnecessary interventions such as antibiotics, asthma medications, or developmental referrals.

Key Concept

Children with a clinical diagnosis of Neurofibromatosis type 1 (NF1) require routine comprehensive ophthalmologic screening for optic pathway gliomas.
Estimated Time:1m 30s
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Topics

Pediatric Neurologic Disorders

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