Treatment question of a Non-Hodgkin's Lymphoma of large diffuse large B cell phenotype in left cerebral hemisphere

My patient is over 55 years old, has diagnosed above Non Hodgkin's Lymphoma of large diffuse large B cell phenotype in left cerebral hemisphere.

Right side is paralysed. patient is in the hospital and able to recognize. Its about 2 months and today only diagniosed. The only symptom was loss of speech

What should be the treatment?

What is the survival hope for this patient?

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