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Effect of excess estrogen on breast and external genitalia development in growth hormone deficiency

Susumu Hagisawa1, Naoto Shimura, Osamu Arisaka

  • 1Department of Pediatrics, Dokkyo Medical University School of Medicine, Mibu, Tochigi-ken, Japan.

Journal of Pediatric and Adolescent Gynecology
|December 31, 2011
PubMed

Insights

Insulin-like growth factor-I (IGF-I) is crucial for female sexual maturation. This case highlights IGF-I

Area of Science:

  • Pediatric Endocrinology
  • Reproductive Endocrinology
  • Growth Hormone Deficiency

Background:

  • Sexual maturation and development in females with growth hormone (GH) and insulin-like growth factor-I (IGF-I) deficiency are not well-documented.
  • Understanding these processes is vital for diagnosing and managing endocrine disorders in children.

Observation:

  • A 2-year-old girl with GH deficiency presented with delayed sexual maturation.
  • She exhibited areola/nipple hyperpigmentation without breast mounds and underdeveloped labia minora.
  • Hormonal analysis revealed high estradiol and critically low IGF-I levels.

Findings:

  • The patient later developed central precocious puberty.
  • Despite elevated estradiol, breast and external genitalia development were impaired, suggesting a role for IGF-I.

Implications:

  • This case underscores the essential role of IGF-I in mediating estrogen's effects on female sexual development.
  • It highlights the complex interplay between GH, IGF-I, and estrogen in pubertal progression.
  • Further research is needed to elucidate the precise mechanisms and clinical significance.
Abstract

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