Abstract Title:

Bone mineral density in breast cancer patients with positive estrogen receptor tumor status.

Abstract Source:

Maturitas. 2007 Jul 20;57(3):221-5. Epub 2007 Jan 19. PMID: 17240090

Abstract Author(s):

Tsutomu Douchi, Yukie Yonehara, Shoichiro Kosha, Ichiro Iwamoto, Yoshiaki Rai, Yoshiatsu Sagara, Yoshihisa Umekita

Article Affiliation:

Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan. tomy@m3.kufm.kagoshima-u.ac.jp

Abstract:

AIM: The aim was to investigate bone mineral density (BMD) in breast cancer patients with positive estrogen receptor (ER) tumor status.

METHODS: The participants were 110 postmenopausal breast cancer patients with positive estrogen receptor (ER+) tumor status. Two hundred and sixty-one age-matched, healthy postmenopausal women, all of whom were selected from our pooled data, served as controls. Age, age at menopause, years since menopause (YSM), height, weight, and body mass index (BMI, wt/ht(2)) were recorded. Lumbar spine (L2-4) BMD and Z-score were assessed by dual-energy X-ray absorptiometry.

RESULTS: Bone mineral density in breast cancer patients was significantly higher than that in controls (0.89+/-0.12 g/cm(2) versus 0.84+/-0.16 g/cm(2), P<0.01). The Z-score in breast cancer patients was also higher than that in controls (110+/-13.6% versus 100+/-9.8%, P<0.001). Higher BMD and Z-score in breast cancer patients remained significant after adjusting for age, YSM, and BMI (P<0.05).

CONCLUSIONS: Postmenopausal breast cancer patients with positive ER tumor status have higher BMD. Positive ER tumor status may be associated with higher cumulative exposure to estrogen.

Study Type : Human Study

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