Regression of hepatocellular carcinoma during vitamin K administration

Figure 1 Giant tumor with central hypoechoic area dominated the right lobe of the liver (A) and remarkable regression of tumor with obscure margin after administration of vitamin K (B).

Figure 2 Enhancement of peripheral portion of tumor during early arterial phase (A) and hypoattenuation during portal phase (B) as well as remarkable tumor regression and no enhancement during early arterial phase (C) and portal phase (D) 5 mo after administration of vitamin K.

Figure 3 Clinical course of the patient.