Perforation of the cervix by the threads of a levonorgestrel-releasing intrauterine system: a case report

Asymptomatic retraction of intrauterine device (IUD) threads into the cervical canal or uterine cavity is a common complication. We present the rare case of a 44-year-old woman with the threads protruding through an opening in the anterior cervical lip about 1?cm above the external cervical os. Despite this presentation, her management was straightforward. We review the literature and discuss the possible antecedents of the phenomenon in this patient.