Upon admission, the hematological parameters of Case 1 indicated normocytic normochromic anemia (RBC = 3.3 × 106/mm3, MCV = 96.97 fL, Hb = 11.74 g/dL) and leukopenia (7700/μl) with lymphopenia (154/μl). The gene discussed is GSTM1; the disease is Decreased total leukocyte count.