Rochelle Shoretz, whose own breast cancer diagnosis at age 28 led her to found the national cancer organization Sharsheret, died Sunday afternoon at her home in Teaneck, New Jersey. She was 42. The cause of death was complications from breast cancer. Shoretz founded Sharsheret in 2001, while undergoing chemotherapy. The organization provides health information and support services for Jewish women living with breast cancer or ovarian cancer, or who are at increased risk for those diseases.Jewish women of Ashkenazi descent are at heightened risk for certain genetic mutations that can lead to cancer.A graduate of Columbia Law School, Shoretz went on to clerk for United States Supreme Court Justice Ruth Bader Ginsburg. She is thought to be the first Orthodox Jewish woman to clerk for a Supreme Court justice.“When I was diagnosed [in July 2001], there were a lot of offers to help with meals and transport my kids, but I really wanted to speak to another young mom who was going to have to explain to her kids that she was going to lose her hair to chemo,” Shoretz told JTA in 2003, of her decision to start Sharsheret.The organization’s name is Hebrew for chain.Shoretz beat her initial bout with the disease. But in 2009, the cancer returned, and it had spread. No longer curable, it was treatable — and friends say her energy and resolve were boundless until the end. Shoretz is survived by two teenage sons, Shlomo and Dovid Mirsky; her mother, Sherry Tenenbaum; her father, Morris Shoretz; five sisters, and two brothers. She was a stepdaughter of Jeffrey Tenenbaum and Carol Ann Finkelstein.A funeral and interment will be held Monday in New Jersey.