Breast cancer in women under age 40 years: treatment by total mastectomy and reconstruction.

INTRODUCTION: Breast cancer in women under 40 years of age is rare, accounting for approximately 5% of cases. The disease tends to be more aggressive in younger women. Younger age has been shown to be an independent predictive of breast reconstruction after total mastectomy. Treatment by total mastectomy and reconstruction is examined in relation to patient age.
METHODS: A retrospective review of all breast cancer patients treated by total mastectomy and reconstruction between 2005 and 2009 was performed by querying a prospective database.
RESULTS: A total of 671 patients underwent total mastectomy and reconstruction; of them, 106 (16%) aged <40 and 565 (84%) aged ≥40 years. Compared with older patients, the age <40 group was more likely to present with advanced breast cancer (P < 0.001), receive radiation (P = 0.006), undergo contralateral prophylactic mastectomy (P < 0.001) and bilateral reconstruction (P = 0.005), and undergo delayed reconstruction (P = 0.02). Transverse rectus abdominis musculocutaneous flap reconstruction was more common in the age ≥40 years (P = 0.03). Bilateral reconstruction was most commonly performed with tissue expansion regardless of patient age.
CONCLUSIONS: Breast reconstruction in women less than 40 years of age is influenced by advanced tumor stage and the necessity for adjuvant radiation therapy as well as an increased use of contralateral prophylactic mastectomy.