my dad has been diagnosed with b lymphoma and hes going to be going through chemotherapy in one week they said that his b lymphoma is cancerous i dont know what stage hes in cause thats all my moms telling me my dad is really depressed and losing weight and is week they found his cancer in his stomache i dont know how far its progressed can any one let me know what the b stands for iam so confused and really worried about my dad. mary