Lessons From the Friday Unknowns The patient is a 67-year-old man with autoimmune hemolytic anemia associated with cold agglutinins. Peripheral blood: WBC: 4.2 K/uL, Hgb 8.5 g/dL, MCV 96.8 fL, Platelet 248 K/uL Mild normocytic, normochromic anemia with red cell agglutinates, normal leukocyte count with rare atypical lymphocytes and no circulating blasts, normal platelet count…