Medicine A 63 year old man presents with splenomgaly and lymphadenopathy. Immunophenotype was positive for CD 19, CD79b and FMC7. The most likely diagnosis is: A Hairy cell leukemia B Mantle cell Lymphoma (MCL) C Chronic Lymphocytic Leukemia (CLL) D Follicular Lymphoma 💡 Explanation A 63 year old man presents with splenomgaly and lymphadenopathy. Immunophenotype was positive for CD 19, CD79b and FMC7. The most likely diagnosis is: ✓ Correct Answer: B. Mantle cell Lymphoma (MCL)