Background: Endocrine therapy (ET) significantly reduces the risk of breast cancer development in high-risk patients diagnosed with lobular carcinoma in situ (LCIS). However, the variables impacting recommendation and use of ET in young adults (YAs) is not well-studied. We examined the role of provider recommendation and patient acceptance for ET for YAs with LCIS.
Materials and methods: The National Cancer Database was queried for women aged < 40 years with primary LCIS between 2000 and 2012. Socioeconomic, demographic, and treatment variables were examined to determine their impact on ET provider recommendation and initial patient acceptance of risk-reducing therapy.
Results: Among 1650 YA patients with LCIS, only 749 (45.4%) were recommended ET. On multivariable analysis, women > 30 years of age were more likely recommended ET than women < 30 years (odds ratio [OR], 1.64; 95% confidence interval [CI], 1.10-2.47), African Americans more than other ethnicities (OR, 1.48; 95% CI, 1.1-2.0), and YAs treated in New England were more likely than those in the rest of the country (OR, 3.26; 95% CI, 2.0-5.2). Among YA women recommended ET, only 20.2% had a documented refusal. Only geography appeared to independently impact the likelihood of refusal, with YAs in the Southeastern-Central United States being most likely to refuse ET (OR, 5.4; 95% CI, 1.2-24.0).
Conclusion: ET is underutilized for risk-reduction in YAs with LCIS. This underuse appears dependent on disparities in provider recommendation practices rather than non-acceptance of therapy. This may reflect regional practice patterns, community standards of care, or provider bias regarding the significance of LCIS as a risk factor for development of invasive cancer.
Keywords: AYAs; Disparities; Hormone therapy; LCIS; NCDB.
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