Bilateral breast carcinoma: 28 years' experience

Area of Science:

• Oncology
• Epidemiology
• Clinical Medicine

Background:

• Bilateral breast carcinoma (BBC) presents a complex clinical challenge.
• Understanding the characteristics and outcomes of BBC is crucial for patient management.

Purpose of the Study:

• To analyze the incidence and clinical features of bilateral breast carcinoma.
• To compare BBC patients with unilateral breast carcinoma (UBC) patients.
• To investigate the prognostic significance of the time interval between primary and secondary breast cancer diagnoses.

Main Methods:

• Retrospective review of 1,182 breast cancer patients diagnosed between 1959 and 1987.
• Identification of 48 patients (4.06%) with bilateral breast carcinoma.
• Comparison of clinical data between simultaneous and nonsimultaneous BBC cases, and between BBC and UBC cohorts.

Main Results:

• 48 patients (4.06%) had bilateral breast carcinoma; 8 simultaneous (0.68%) and 40 nonsimultaneous (3.38%).
• The mean interval between the first and second primary breast cancer was 86 months (range: 17-200 months).
• Second primary carcinomas showed higher rates of axillary metastasis (48% vs. 37.5%).
• Shorter time intervals between primary and secondary diagnoses were associated with poorer survival.

Conclusions:

• Bilateral breast carcinoma is a relatively uncommon but significant clinical entity.
• While risk factors like pregnancy and family history did not differ significantly, axillary metastasis was more prevalent in the second primary breast cancer.
• The time interval between diagnoses is a critical prognostic factor in bilateral breast carcinoma.