Nutrition and Dietetics / Magnetic Resonance Imaging / Case Report / Humans / Male / Central Nervous System / Monoclonal Antibodies / Doxorubicin / Adult / X ray Computed Tomography / Cyclophosphamide / Follicular lymphoma / Central Nervous System / Monoclonal Antibodies / Doxorubicin / Adult / X ray Computed Tomography / Cyclophosphamide / Follicular lymphoma