Disease Behavior and Treatment Response of Special Histological Types of Triple-Negative Breast Cancer.

Background: Special histological types (SHT) of triple-negative breast cancer (TNBC) are a heterogeneous group of rare poorly understood diseases. We aimed to evaluate the clinical features, treatment, and outcomes of patients with SHT of TNBC.

Methods: We evaluated patients with a SHT of TNBC treated in a cancer center between 2009 and 2020.