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Difficulty: HardPediatric Neurologic Disorders

A 3-year-old boy is brought to the pediatric neurology clinic by his mother and 14-year-old sister for a routine follow-up of his seizure disorder. He has a history of infantile spasms that have now evolved into focal impaired awareness seizures. Examination of the boy reveals erythematous, papular facial lesions clustered around the nose and a thickened, elevated plaque on his lumbosacral region.

During the developmental assessment, the mother expresses concern about the boy's progress. He can walk up steps with assistance and build a tower of six blocks, but he is unable to copy a cross or hop on one foot.

During the visit, the 14-year-old sister asks to speak to the physician privately. She requests a prescription for oral contraceptives, explicitly asking that her mother not be informed. Additionally, the sister complains of a mild cough, rhinorrhea, and sore throat that began 48 hours ago; her physical exam is consistent with an uncomplicated viral upper respiratory infection, yet she asks for a strong antibiotic to "knock it out quickly."

Which of the following statements regarding the management and clinical evaluation of these patients are correct? (Select all that apply)

  1. The 3-year-old boy's underlying neurocutaneous disorder warrants routine surveillance with abdominal ultrasonography to detect angiomyolipomas.Answer
  2. The 3-year-old boy is at a significantly increased risk for developing subependymal giant cell astrocytomas, which can cause obstructive hydrocephalus.Answer
  3. C
    The 3-year-old boy exhibits a marked delay in fine motor and gross motor development, as copying a cross and hopping on one foot are milestones expected by 36 months of age.
  4. D
    The physician should prescribe a course of broad-spectrum antibiotics, such as amoxicillin-clavulanate, for the 14-year-old sister to prevent secondary bacterial complications.
  5. E
    The physician must refuse the 14-year-old sister's request for confidential contraception and notify the mother, as parental consent is universally required for minors.

Answer

The correct statements are that the 3-year-old boy requires routine abdominal ultrasonography to detect angiomyolipomas, and he is at an increased risk for developing subependymal giant cell astrocytomas (SEGAs).
The correct statements accurately reflect the multi-system complications associated with Tuberous Sclerosis Complex (TSC). The boy's triad of infantile spasms, facial angiofibromas, and a shagreen patch is diagnostic for TSC. These patients are highly prone to benign tumors across multiple organ systems. Specifically, they require routine abdominal imaging (e.g., ultrasonography) to monitor for renal angiomyolipomas, which can spontaneously hemorrhage if they grow too large. Furthermore, they are at high risk for central nervous system tumors, primarily subependymal giant cell astrocytomas (SEGAs), which typically arise near the foramen of Monro and require monitoring via brain MRI due to the risk of obstructive hydrocephalus.

Step-by-Step Solution

1
Diagnose the 3-year-old boy's underlying condition based on dermatologic and neurologic findings.
The combination of a history of infantile spasms, facial angiofibromas (erythematous papules around the nose), and a shagreen patch (thickened lumbosacral plaque) establishes a clinical diagnosis of Tuberous Sclerosis Complex (TSC).
Identifying the unifying syndromic diagnosis is essential to determine the correct screening and surveillance protocols.
2
Identify the recommended multi-system surveillance protocols for Tuberous Sclerosis Complex.
Patients with TSC require regular MRI of the brain to monitor for subependymal giant cell astrocytomas (SEGAs) and abdominal ultrasonography to monitor for renal angiomyolipomas.
Proactive surveillance prevents severe morbidity, such as obstructive hydrocephalus from SEGAs or retroperitoneal hemorrhage from enlarging angiomyolipomas.
3
Evaluate the 3-year-old boy's developmental milestones.
The boy can walk up steps and build a tower of six blocks, which are appropriate for a 3-year-old. The inability to copy a cross or hop on one foot is normal, as these are 4-year (48-month) milestones.
Accurate assessment of milestones prevents the misdiagnosis of developmental delay.
4
Assess the 14-year-old sister's clinical requests against medical ethics and antimicrobial stewardship guidelines.
Her request for confidential contraception must be honored, as minors can legally consent to sexual health care. Her request for antibiotics for a viral URI must be denied to prevent antibiotic misuse.
Physicians must adhere to legal standards regarding adolescent confidentiality and evidence-based guidelines for antibiotic prescription.

Key Concept

Tuberous Sclerosis Complex (TSC) presents with characteristic cutaneous findings and requires specific multi-organ tumor surveillance; comprehensive care also requires integration of normal developmental milestones, antibiotic stewardship, and adolescent confidentiality.
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Topics

Pediatric Neurologic Disorders

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