The effect of tamoxifen or exemestane on bone mineral density during the first 2 years of adjuvant treatment of postmenopausal women with early breast cancer.

BACKGROUND: Adjuvant therapy with aromatase inhibitors is associated with increased bone loss in postmenopausal women with breast cancer. We assessed changes in bone mineral density (BMD) from baseline to 24 months in patients receiving either tamoxifen (T) or exemestane (E). PATIENTS AND METHODS: A total of 578 women randomly assigned to T 20 mg per day orally or E 25 mg/day orally enrolled in this substudy; baseline, 12-month, and 24-month BMD measurements of the femur and lumbar spine by dual-energy x-ray absorptiometry were planned. Women receiving bone antiresorptive agents were excluded. Mean BMD changes from baseline to 12 and 24 months were tested between the treatment groups using 2-sample t tests and both g/cm2 (as percent changes) and T scores (as differences from baseline). RESULTS: A total of 167 women with all 3 imaging studies were evaluable and form the basis of this report (T=89, E=78). Using T scores, the mean difference from baseline was significant between the 2 groups at 12 months at both the spine (P=.0002) and the hip (P=.0004), and at 24 months only at the hip (P=.02). CONCLUSION: More bone loss occurred during the first 12 months of treatment with E compared with T, but by 2 years the differences were less apparent and bone loss with E had slowed.

Risk counseling and management in patients with lobular carcinoma in situ.

BACKGROUND: The understanding of lobular carcinoma in situ (LCIS) has evolved since it was first described. LCIS once was thought to be a premalignant condition, but now it is considered a marker for increased risk for developing invasive breast cancer. We evaluated patient perception of risk, counseling, and subsequent management. METHODS: A community cancer registry of 3,605 cases of breast cancer was reviewed. Fifty-five (1.5%) patients with LCIS as their sole diagnosis were identified and these patients were sent a questionnaire. RESULTS: Forty of 55 patients completed the questionnaire for a 73% response rate. The patients' perception of lifetime risk for invasive cancer was variable. Surgeons performed the majority of counseling. Fourteen patients (35%) were placed on a selective estrogen-receptor modulator. Eleven patients (28%) had bilateral mastectomy. Three patients had unilateral mastectomy. Screening recommendations included an annual mammography (64%), a professional examination (64%), and a monthly self-breast examination (75%). CONCLUSION: A patient's perception of risk for invasive breast cancer after a diagnosis of LCIS is widely variable. Patients will adhere to suggested screening recommendations. Surgeons are performing the majority of counseling and must stay abreast on current recommendations.