On November 27, 2023, the U.S. Food and Drug Administration (FDA) announced the approval of OgsiveoTM (nirogacestat) for the treatment of progressing desmoid tumors in adult patients who need systemic treatment. Desmoid tumors are noncancerous growths found in the connective tissue of the abdomen, arms and legs. They do not spread to other areas of the body, but they can grow rapidly and impact surrounding tissues and organs. Patients with desmoid tumors may experience pain and mobility issues that impact their quality of life. OgsiveoTM is the first treatment approved for desmoid tumorsand will be available as oral tablets. In a randomized, double-blind, placebo-controlled trial, 142 patients with progressing desmoid tumors were given OgsiveoTM or placebo. Participants in the OgsiveoTM group showed improvement in progression-free survival and a higher objective response rate compared to placebo. Common adverse effects include diarrhea, disrupted menstrual cycle, rash, nausea, fatigue, inflammation of the mouth, headache, abdominal pain, cough, hair loss, upper respiratory tract infection and shortness of breath. OgsiveoTM was granted Priority Review, Breakthrough Therapy designation, Fast Track designation and Orphan Drug designation by the FDA.