title: Chemotherapy-induced amenorrhea, menopause-specific quality of life, and endocrine profiles in premenopausal women with breast cancer who received adjuvant anthracycline-based chemotherapy: a prospective cohort study.
abstract: OBJECTIVE
  We conducted a prospective observational study for premenopausal women receiving adjuvant adriamycin and cyclophosphamide-containing regimens to define the pattern of chemotherapy-induced amenorrhea (CIA), the menopause-specific quality of life (MENQOL), and the hormone profiles.
  
  
  METHODS
  From October 2003 to July 2007, 387 patients with breast cancer who underwent curative surgery were prospectively included. Patient self-assessment by MENQOL questionnaires and blood samples for hormone assays were taken before chemotherapy, and 1, 6, and 12 months after chemotherapy was completed.
  
  
  RESULTS
  Patients were categorized into three groups according to their duration and reversibility of amenorrhea, with 312 eligible patients split into long-term CIA (n = 180, 57.7 %), temporary CIA (n = 113, 36.2 %), and menstrual irregularity (n = 19, 6.1 %) groups. Risk factors for long-term CIA were identified as age ≥40 years (p < 0.001), the addition of taxane (p = 0.01), and tamoxifen use (p = 0.03). MENQOL was worst immediately after the completion of adjuvant chemotherapy, and this was not fully recovered even 12 months after chemotherapy had finished. Age ≥40 years and tamoxifen exposure were inversely associated with MENQOL. In long-term CIA patients, the level of follicle-stimulating hormone increased after chemotherapy; this level, however, was reduced in patients who received tamoxifen, but remained high and stable in those who did not (p < 0.001 at 6 months; p < 0.001 at 12 months).
  
  
  CONCLUSIONS
  This study showed that most premenopausal breast cancer patients who received adjuvant chemotherapy experienced clinically significant CIA, followed by impaired MENQOL. Our findings may be relevant in the decision-making processes for premenopausal women with breast cancer.
authors.affiliation: Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro, Songpa-gu, Seoul, Korea.
authors.forename: Changhoon
authors.initials: C
authors.lastname: Yoo
authors.forename: Mi Ra
authors.initials: MR
authors.lastname: Yun
authors.forename: Jin-Hee
authors.initials: JH
authors.lastname: Ahn
authors.forename: Kyung Hae
authors.initials: KH
authors.lastname: Jung
authors.forename: Hwa Jung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Jeong Eun
authors.initials: JE
authors.lastname: Kim
authors.forename: Jeong Yun
authors.initials: JY
authors.lastname: Park
authors.forename: Kwang Ok
authors.initials: KO
authors.lastname: Park
authors.forename: Dok Hyun
authors.initials: DH
authors.lastname: Yoon
authors.forename: Sung-Bae
authors.initials: SB
authors.lastname: Kim
mesh_terms: D000328:Adult; D000367:Age Factors; D000568:Amenorrhea / Q000139:chemically induced*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000473:pathology; D001952:Bridged-Ring Compounds / Q000008:administration & dosage; D017024:Chemotherapy, Adjuvant; D015331:Cohort Studies; D003520:Cyclophosphamide / Q000008:administration & dosage; D004317:Doxorubicin / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008875:Middle Aged; D017697:Premenopause; D011446:Prospective Studies; D011788:Quality of Life; D012307:Risk Factors; D011795:Surveys and Questionnaires; D013629:Tamoxifen / Q000008:administration & dosage; D043823:Taxoids / Q000008:administration & dosage; D013997:Time Factors
chemical_list: D001952:Bridged-Ring Compounds; D043823:Taxoids; D013629:Tamoxifen; C080625:taxane; D004317:Doxorubicin; D003520:Cyclophosphamide