Update on the role of aromatase inhibitors in growth disorders

Horm Res. 2009 Jan;71 Suppl 1:57-63. doi: 10.1159/000178040. Epub 2009 Jan 21.


Background: Without oestrogen action, the fusion of the growth plates is postponed and longitudinal growth continues for an exceptionally long period of time. Aromatase inhibitors that block oestrogen biosynthesis have therefore emerged as a new potential treatment option for children with short stature. Results from three prospective randomised controlled trials using potent third-generation aromatase inhibitors have recently been published. These studies all show that treatment with the aromatase inhibitors letrozole and anastrozole effectively delays bone maturation and increases predicted adult height in boys with constitutional delay of growth and puberty (CDGP), idiopathic short stature and growth hormone deficiency. Long-term follow-up data from the study in which boys with CDGP were treated with letrozole for 1 year during adolescence suggest that the achieved gain in predicted adult height also results in taller final adult height.

Conclusions: Until the safety profile of aromatase inhibitors, particularly their qualitative effects on bone development, is established, use of these agents must be considered experimental in treating short stature.

Publication types

  • Evaluation Study
  • Review

MeSH terms

  • Aromatase Inhibitors / adverse effects
  • Aromatase Inhibitors / pharmacology
  • Aromatase Inhibitors / therapeutic use*
  • Body Height / drug effects
  • Bone Development / drug effects
  • Cognition / drug effects
  • Cognition / physiology
  • Fertility / drug effects
  • Growth Disorders / blood
  • Growth Disorders / drug therapy*
  • Growth Disorders / physiopathology
  • Health Planning Guidelines
  • Humans
  • Insulin Resistance / physiology
  • Lipids / blood
  • Treatment Outcome


  • Aromatase Inhibitors
  • Lipids