GSTM1 and Pancytopenia: She visited her primary care hospital several times and her initial complete blood count (CBC) revealed pancytopenia with a hemoglobin (Hb) level of 10.4 g/dL, a white blood cell (WBC) count of 2370 cells/mm3 (53% neutrophils, 21% lymphocytes, and 14% eosinophils), and a platelet count of 96,000 cells/mm3.