In certain embodiments, methods, compounds, and compositions for treating B-cell lymphoma or hepatocellular carcinoma by inhibiting expression of STAT3 mRNA or protein in an animal are provided herein. Such methods, compounds, and compositions are useful to treat, prevent, or ameliorate B-cell lymphoma or hepatocellular carcinoma. The STAT (signal transducers and activators of transcription) family of proteins are DNA-binding proteins that play a dual role in signal transduction and activation of transcription.