We report that an intrauterine contraceptive device (IUCD) embedded within intrauterine tumour (submucous myoma) in a postmenopausal woman was misdiagnosed, definitively diagnosed and successfully removed with hysteroscopic resection. Hysteroscopy and hysteroscopic resection of the submucous myoma with IUCD should be reserved as a minimally invasive, safe and reliable treatment method, and can avoid a laparotomy and hysterotomy. This is believed to be the first reported case of such an occurrence.