triple-negative
adj.— «As Dr. Lyndsay Harris, director of the breast cancer program at Yale Cancer Center, explains it, young black women are more likely to get what is called a “triple negative” tumor: a fast-growing, aggressive cancer that doesn’t respond well to many treatments.» —“Blacks on guard for cancer” by Kathleen Megan Hartford Courant (Connecticut) Oct. 22, 2006. (source: Double-Tongued Dictionary)