A 7-year-old girl is brought with rapid breast development, pubic hair appearance, and a recent growth spurt. Bone age is 11 years. LH response to GnRH stimulation test is pubertal (LH >5 IU/L). Brain MRI shows a small hypothalamic hamartoma. Which of the following is the most appropriate management?
- A Surgical excision of the hypothalamic hamartoma
- B Aromatase inhibitor (letrozole) to block estrogen production
- C GnRH agonist therapy (leuprolide) to suppress the hypothalamic-pituitary axis and preserve final height ✓
- D Observation only, as hypothalamic hamartomas involute spontaneously
Explanation
This is central precocious puberty (CPP) caused by a hypothalamic hamartoma, which secretes GnRH in a pulsatile fashion, activating the HPG axis prematurely. The treatment of choice is GnRH agonist therapy (e.g., leuprolide, triptorelin), which paradoxically suppresses gonadotropin secretion (downregulates pituitary GnRH receptors) and halts pubertal progression, allowing the bone age to stabilize relative to chronological age and thereby preserving final adult height. Surgery is not recommended for hamartomas causing only CPP (surgery is considered for intractable epilepsy in gelastic seizures). Aromatase inhibitors are used for peripheral precocious puberty (gonadotropin-independent), not central precocious puberty.
Reference: Ghai Essential Pediatrics, 10th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.