Krystyna
I saw your message and had to reply. My dad has/had diffuse large B-cell lymphoma (gastric). I can't offer insight on bone lesions but I can recommend the Memorial Sloan Keterring Hospital website: www.mskcc.com (it may be .org if .com doesn't work). They have a website with detailed explanations, listings of doctors, contact info etc. Call them perhaps you can go in for a consultation. Contact me if you need help since my dad is being treated there. Information is power! For our dads sake and that of all other cancer victims, I pray that they find a cure for this soon. Good luck!