A Single-Arm, Open-Label Phase 4 Study of Nirogacestat in Adult Premenopausal Females With Desmoid Tumors/Aggressive Fibromatosis (DT/AF)
This study is being conducted to study how nirogacestat may affect the ovarian function of adult premenopausal women with progressing desmoid tumors/aggressive fibromatosis.
• Participant is female, postpubertal aged ≥18 and ≤40 years of age at the time of signing the informed consent and premenopausal at baseline. Premenopausal is defined as meeting all of the following: Estradiol \>30 pg/mL. Follicle-stimulating hormone (FSH) \<40 IU/L. Regular menses (e.g., menstrual cycle length of 21 to 35 days) for at least 3 menstrual cycles prior to signing informed consent
• Participant uses 1 highly effective non-hormonal contraceptive method, has a negative pregnancy test prior to first dose of study treatment), is not breastfeeding, agrees to not harvest or donate eggs for at least 90 days prior to and during the study
• Participant has histologically confirmed DT/AF with symptomatic or progressive disease requiring systemic treatment
• Participant has an Eastern Cooperative Oncology Group (ECOG) performance status ≤2 at screening
• Participant has adequate organ and bone marrow function.