Evolutionary Profil of Triple-Negative Breast Cancer and Influence of Histopronostic Factors: Experience of Oncology Department Chu Ibn Rochd Casablanca

Abstract

Triple-negative breast cancer (TNBC) is a subgroup of breast cancer with hormone receptor and Her2 overexpression absence, accounting for 15%–20% of all breast cancers. Its unpredictable evolution, poor treatment response, and highly invasive nature warrant research interest. The main objective of this study is to assess the evolution of triple-negative breast cancer as a role for histopronostic factors. We present the evolutionary profile of triple-negative breast cancer in the role of histopronostic factors using data from a four-year retrospective study of cases of triple-negative breast cancer collected in the oncology-radiotherapy department at Chu Ibn Rochd Casablanca between January 2015 and December 2019. 232 patients were included, regardless of disease stage. The mean age was 49.54 ± 11.21 years. In 68% of cases, the disease was localized. All metastatic patients (32%) died, with a median survival of 15 months. We analyzed the evolution of triple-negative breast cancer in localized disease as a role for age, tumor size, histological type, SBR grade, lymph node invasion, and vascular invasion, with a median follow-up of 24 months (2 years). In 158 patients in our series with localized disease, local or locoregional recurrence was noted in 16% of cases, metastatic relapse in 10%, and 30% of cases were still in complete remission. Patients aged between 40 and 50 had a higher rate of local and locoregional recurrence. Patients with tumors between 2 and 6 cm in size had a high rate of metastasis and death. Grade SBR III is generally marked by a poor prognosis, with 39 patients having local or locoregional recurrence, 41 patients having metastases, and 15 patients having died. In our series, the greater the lymph node and vascular invasion, the poorer the prognosis, with a higher risk of recurrence and metastasis. These results support the role of early screening, especially for at-risk patients, adequate therapeutic management, and active surveillance of patients with triple-negative breast cancer. New research has shown the effectiveness of immune checkpoint inhibitors and anti-parp in treating advanced triple-negative breast cancer (TNBC), with encouraging findings indicating their potential benefit. Clinical studies including anatomical pathologists, oncologists, and fundamental researchers must be conducted globally to achieve this. Clinical studies involving pathologists, oncologists, and basic researchers are needed worldwide to define new therapeutic strategies for the management of this type of aggressive breast cancer.