This episode of Audio Abstracts reviews two studies conducted in Finland that investigated the link between premenopausal use of hormonal intrauterine treatment for menorrhagia and breast cancer incidence rates.

The first study, Cancer Risk in Women Using the Levonorgestrel-Releasing Intrauterine System in Finland, examined the incidence rates of several common cancers among intrauterine treatment users. The authors found that the risk of breast cancer increased within this patient population, while all other cancer risk profiles decreased.

As a follow-up to this study, a second publication titled Levonorgestrel-Releasing Intrauterine System and the Risk of Breast Cancer: A Nationwide Cohort Study, reported that patients using this IUD were at an increased risk of lobular and ductal breast cancers, specifically.