Overview A Phase I Study of Niraparib Administered Concurrently With Postoperative RT in Triple Negative Breast Cancer Patients Status: Recruiting Trial end date: 2026-12-31 Target enrollment: Participant gender: Summary This research study involves Niraparib as a possible treatment for triple negative breast cancer. Phase: Phase 1 Details Lead Sponsor: Massachusetts General HospitalCollaborator: Tesaro, Inc.Treatments: Niraparib