[Breast Cancer With Synchronous Metastases At The Gabriel Toure University Hospital: Frequency And Prognosis]

Breast cancer is a public health issue worldwide. One of the main causes of death due to this disease is metastasis, which is understudied in our context. Thus, the objectives of this work were to: (1) estimate the frequency of synchronous metastatic breast cancer; (2) determine the overall survival rate; and (3) identify the main factors associated with metastatic breast cancer death in Malian women.

We conducted a retrospective cohort study at Gabriel Touré Teaching hospital on breast cancer cases diagnosed during the period from January 1^st, 2018 to August 31^st, 2021. We included all pathologically confirmed of breast cancer with synchronous metastases. Descriptive statistics were used to analyze sociodemographic and clinical data. Identification of factors associated with metastatic breast cancer death was performed using univariate and multivariate Cox regression models to produce adjusted hazard ratios (AHR) with their 95% confidence intervals.

During the study period, a total of 231 cases of breast cancer were diagnosed in our department; among them, 60 cases were synchronous metastatic breast cancer (26%). The mean age of these cases was 45.3 ±12.1 years old. The most common histological form was non-specific infiltrating carcinoma, 55 cases (91.7%). The main metastatic sites were lung alone, 26 cases (43.3%), liver alone, 12 cases (20.0%) and 16 cases (26.6%) had more than one metastatic sites. The overall 2-year survival was less than 20%. Factor associated with the risk of death was lung metastases; AHR = 4.22 [95% CI: 1.13 - 15.79].

Synchronous metastatic breast cancer was very common in our setting and a poor prognosis was observed in patients with lung metastasis.