Interactive Precocious Puberty Management Guide

A clinical decision tool for Pediatricians

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Sequential Management Diagram

Step 1: Suspicion and Initial Evaluation

Definition of Precocious Puberty (PP)

  • Girls: Development of secondary sexual characteristics (thelarche, pubarche) before 8 years.
  • Children: Increase in testicular volume (>4 ml) before 9 years.

Pediatrician Actions

  1. Complete anamnesis: Investigate growth rate, family history of puberty, exposure to exogenous steroids, neurological symptoms (headache, visual disturbances).
  2. Comprehensive physical exam:
    • Weight, height and growth speed (essential).
    • Tanner staging (breasts and pubic hair).
    • Testicular volume (use Prader orchidometer).
    • Skin (café au lait spots, acne).
    • Neurological examination.
  3. Key initial study:
    • Bone Age: Request an x-ray of the left hand and wrist. It is the most important study in the initial evaluation.

Step 2: Bone Age Interpretation and Decision

Analysis of the Bone Age (OE) Result

  • Option A: OE according to or slightly advanced (<1 year) to the Chronological Age (CE):
    • Probable diagnosis: Variant of normality (e.g. Isolated Thelarche/Pubarche).
    • Conduct: Reassure parents. Clinical and auxological follow-up every 4-6 months to reevaluate growth speed and pubertal progression. No further studies are required at this time.
  • Option B: EO significantly advanced (>1-2 years) to the EC:
    • Probable diagnosis: True Precocious Puberty. Skeletal maturation is accelerated.
    • Conduct: This is the main criterion to continue the study and refer to Pediatric Endocrinologist.

Step 3: Referral and Management by Pediatric Endocrinology

When to refer to a Pediatric Endocrinologist?

  • Always that bone age is significantly advanced (>1 year).
  • Rapidly progressive puberty (advancement of >1 Tanner stage in 6 months).
  • Signs of virilization in girls or feminization in boys.
  • Suspected underlying pathology (e.g. neurological symptoms).

Management by the Specialist (for the knowledge of the Pediatrician)

  1. Diagnostic confirmation: The aim is to differentiate whether puberty is Central (dependent on GnRH) or Peripheral (independent of GnRH).
    • Studies: Basal LH, FSH, Estradiol/Testosterone. The definitive study is Stimulus test with GnRH, where an LH pubertal response confirms Central Precocious Puberty (CPP).
    • Neuroimaging: In all confirmed PPC (especially in boys and girls <6 years old), a Brain MRI to rule out CNS lesions.
  2. Treatment of Central Precocious Puberty (CPP):
    • Aim: Slow pubertal progression, improve the prognosis of final height and mitigate the psychosocial impact.
    • Medication of choice: GnRH analogues. They create a desensitization of the pituitary gland, stopping the production of LH and FSH.
    • Common presentations and doses:
      • Leuprorelin Acetate: Intramuscular injection. Dosage adjusted by weight.
        • Monthly presentation (e.g. 7.5 mg, 11.25 mg)
        • Quarterly presentation (e.g. 11.25 mg, 30 mg)
      • Triptorelin: Intramuscular injection.
        • Monthly or quarterly presentation.
  3. Endocrinology Follow-up:
    • Clinical and auxological evaluation every 3-6 months.
    • Periodic analytical control to confirm hormonal suppression.
    • Annual bone age control.
    • Treatment is usually discontinued at a bone age of 12-12.5 years in girls and 13-13.5 years in boys.

Step 4: Referral to Other Specialties

Psychology/Mental Health

  • Indication: Anxiety, low self-esteem, social adjustment problems or bullying related to early physical development. It is a fundamental support for the child and the family.

Neurosurgery

  • Indication: If an expansive lesion is detected in the brain MRI (e.g. hypothalamic hamartoma, glioma).

Additional Resources and Evaluation

Recommendations for Parents

✔️ WHAT TO DO

  • Treat the child based on his or her chronological age, not his or her appearance. He remains a child in his emotional and intellectual development.
  • Explain the situation simply and honestly, assuring you that it is a medical condition with treatment.
  • Promote self-esteem focusing on your talents, skills and personality, not your body.
  • Ensure adherence to treatment and attend all medical appointments.
  • Maintain open communication so you can express your fears and insecurities.

❌ What NOT TO DO

  • Don't embarrass him or make him feel different. Avoid comments about your physical development in front of others.
  • Do not assign the responsibilities of a teenager.
  • Do not allow bullying. Talk to the school if necessary.
  • Don't ignore the emotional impact. Appearance is not everything; Your feelings are important.
  • Don't look for "guilty" (feeding, etc.). Most of the time there is no avoidable external cause.

Knowledge Assessment

1. What is the most important initial imaging study when precocious puberty is suspected?

2. A 7-year-old boy has pubic hair and testicular enlargement. His bone age is 2.5 years ahead of his chronological age. What is the most appropriate behavior?

3. What is the main objective of treatment with GnRH analogues in Central Precocious Puberty?

4. Isolated breast development in a 7-year-old girl with bone age consistent with chronological age is known as:

5. In what situation is it mandatory to request a brain MRI?

Literature
  • Carel JC, Léger J. Clinical practice. Precocious puberty. N Engl J Med. 2008;358(22):2366-77.
  • Latronico AC, Brito VN, Carel JC. Causes, diagnosis, and treatment of central precocious puberty. Lancet Diabetes Endocrinol. 2016;4(3):265-74.
  • Pediatric Endocrine Society (PES). Consensus Statement on the Diagnosis and Treatment of Children with Central Precocious Puberty. 2019 Update.
  • Soriano-Guillén L, Argente J. Central precocious puberty: diagnostic and therapeutic aspects. An Pediatr (Barc). 2012;76(1):1-10.
  • UpToDate®. Definition, etiology, and evaluation of precocious puberty. (Consulted in 2024).