TY - JOUR
T1 - Clinical course of 771 patients with bilateral breast cancer
T2 - Characteristics associated with overall and recurrence-free survival
AU - Beinart, Garth
AU - Gonzalez-Angulo, Ana M.
AU - Broglio, Kristine
AU - Mejia, Jaime
AU - Ruggeri, Anthony
AU - Mininberg, Eric
AU - Hortobagyi, Gabriel N.
AU - Valero, Vicente
PY - 2007/12
Y1 - 2007/12
N2 - Purpose: Despite numerous retrospective and case-control studies, risk factors related to overall survival (OS) and recurrence-free survival (RFS) in bilateral breast cancer are still being defined. The aim of our study was to describe tumor properties, patient characteristics, and method of cancer detection for a large cohort of patients with bilateral breast cancer and to assess the associations of these factors with OS and RFS. Patients and Methods: A retrospective chart review was conducted at the University of Texas M. D. Anderson Cancer Center. Among patients with bilateral breast cancer, we compared primary versus contralateral tumors and synchronous versus metachronous cancers. Patient and second tumor characteristics were evaluated for an association with OS and RFS, as measured from diagnosis of the second tumor. Results: Of 11,234 patients with primary breast cancer seen for an initial visit between July 1, 1997, and December 31, 2004, 771 patients (6.9%) were diagnosed with bilateral breast cancer. The 5-year OS rates based on stage of the second tumor were 87.7%, 87.7%, 69.6%, 45.1%, and 23.8% for stages 0, I, II, III, and IV, respectively (P < .0001). The 5-year OS rates for second tumor detection via mammogram/prophy-lactic mastectomy, physical examination, and self-examination were 81.6%, 70.9%, and 65.3%, respectively (P = .01). In addition, lymphovascular invasion, nuclear grade, hormonal receptor status, and histology were significantly associated with OS and RFS (P < .05). In a multivariable analysis, clinical stage and lymphovascular invasion remained significantly associated with OS (P < .05). Conclusion: This study represents the largest single-institution review of bilateral breast cancer. Numerous second tumor characteristics were associated with survival. The results emphasize the importance of earlier detection and improved staging for contralateral breast cancer.
AB - Purpose: Despite numerous retrospective and case-control studies, risk factors related to overall survival (OS) and recurrence-free survival (RFS) in bilateral breast cancer are still being defined. The aim of our study was to describe tumor properties, patient characteristics, and method of cancer detection for a large cohort of patients with bilateral breast cancer and to assess the associations of these factors with OS and RFS. Patients and Methods: A retrospective chart review was conducted at the University of Texas M. D. Anderson Cancer Center. Among patients with bilateral breast cancer, we compared primary versus contralateral tumors and synchronous versus metachronous cancers. Patient and second tumor characteristics were evaluated for an association with OS and RFS, as measured from diagnosis of the second tumor. Results: Of 11,234 patients with primary breast cancer seen for an initial visit between July 1, 1997, and December 31, 2004, 771 patients (6.9%) were diagnosed with bilateral breast cancer. The 5-year OS rates based on stage of the second tumor were 87.7%, 87.7%, 69.6%, 45.1%, and 23.8% for stages 0, I, II, III, and IV, respectively (P < .0001). The 5-year OS rates for second tumor detection via mammogram/prophy-lactic mastectomy, physical examination, and self-examination were 81.6%, 70.9%, and 65.3%, respectively (P = .01). In addition, lymphovascular invasion, nuclear grade, hormonal receptor status, and histology were significantly associated with OS and RFS (P < .05). In a multivariable analysis, clinical stage and lymphovascular invasion remained significantly associated with OS (P < .05). Conclusion: This study represents the largest single-institution review of bilateral breast cancer. Numerous second tumor characteristics were associated with survival. The results emphasize the importance of earlier detection and improved staging for contralateral breast cancer.
KW - Estrogen receptor
KW - Immunohistochemistry
KW - Lymphovascular invasion
KW - Magnetic resonance imaging
KW - Progesterone receptor
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U2 - 10.3816/CBC.2007.n.052
DO - 10.3816/CBC.2007.n.052
M3 - Article
C2 - 18269777
AN - SCOPUS:38049077013
SN - 1526-8209
VL - 7
SP - 867
EP - 874
JO - Clinical breast cancer
JF - Clinical breast cancer
IS - 11
ER -