Despite the importance of this study and its potential impact on the quality of care for patients with breastcancer in developing countries, it may have some limitations: first, because of the design which was a retrospectivecohort study. Somme important data as molecular subtypes were missed in the majority of patients becausethis test is not carried in our country. Secondly, we cannot be taking into account of socio-economical (education,income) data, because they were not recorded. However, in Guinea, the medical care is not free and there isno almost any health insurance. So, patients pay medical care. Thus, the taken into account of socioeconomicaldata in the regression would be helpful to the best understand of the determinants of the prognosis after breastcancer surgery. Finally, the sample size was small. Need to be extended in a large study with a high number ofsamples. However, despite the small size, the power of this retrospective study can be considered as sufficient.