Safety and efficacy of levonorgestrel-releasing intrauterine device in the treatment of atypical endometrial hyperplasia and early endometrial cancer.

LNG-IUD is effective for the management of AEH and EC in young patients who desire fertility-sparing treatment, including those ineligible for MPA owing to the presence of comorbidities and those with recurrence after MPA treatment (6-month treatment), and patients seeking conservative treatment without fertility preservation.