['We aimed to compare the level of thrombocytopenia in cirrhotic patients with HBV and those with HCV, and to investigate whether the reduced serum level of IL-6 in patients with HCV is responsible for the lower platelet count compared to those with HBV through the effect on serum thrombopoietin level.', 'Fifty-three patients with liver cirrhosis, 28 of who were HBV- seropositive (Group A), 25 of who were HCV- seropositive (Group B) and 15 healthy controls were enrolled in this study.', 'Platelet count in group B [75 (1.5-99) K/microL] were lower than those of group A [140 (62-374) K/microL] (p < 0.001). The median levels of serum thrombopoietin in patients [group A: 31.9 (31-113) pg/mL and group B: 38.0 (31.2-102) pg/mL] and controls [31.3 (31-153) pg/mL] did not show statistically significant difference. The patients compared to controls, had higher serum IL-6 levels [3.6 (2-1150) vs. 2.0 (2-9.9) pg/mL], (p < 0.01), which showed similarity in group A and B patients [3.65 (2-1150) vs. 3.3 (2-45) pg/mL], (p=NS). Serum thrombopoietin level was not correlated with serum IL-6 levels in any group. Serum thrombopoietin and IL-6 levels had no relationship with platelet count and with Child-Pugh score.'] Does thrombopoietin or interleukin-6 have no effect on thrombocytopenia of cirrhosis?