[Long-term efficacy and safety with sacituzumab govitecan in a patient with triple-negative breast cancer, multi-treated and high body mass index.].

The metastatic triple negative breast cancer (mTNBC) represents a particularly aggressive form of breast cancer that frequently affects young women under the age of 50. Obesity at the time of breast cancer diagnosis is associated with a worse prognosis. Compared to the recent past, increasing life expectancy and quality of life for patients with mTNBC is now a possible challenge, thanks to a new drug, sacituzumab govitecan (SG), an anti-Trop-2 antibody drug conjugate approved as monotherapy for the treatment of these patients. The presented clinical case documents the efficacy and safety of long-term treatment with SG in an obese young woman with mTNBC who has already undergone multiple treatments. The patient is still responding after 20 months of treatment with good quality of life and social interactions.