The presence of anti-PF4 antibody (sensitivity 97%, specificity 92% at our laboratory using enzyme-linked immunosorbent assay (ELISA)) [28], high concentration of D-dimer and lower platelet count than on the 11th admission day might suggest that the patient had thrombosis with thrombocytopenia syndrome [29]. The gene discussed is PF4; the disease is deep vein thrombosis.