A 95-year-old patient suffered high-grade B-cell lymphoma combined hairy cell leukemia.

This case report discusses a 95-year-old man diagnosed with two types of lymphomas. He was hospitalized for erysipelas in September 2018. The lymph node revealed high-grade B-cell lymphoma with Myc and Bcl-2 rearrangement. Bone marrow biopsy revealed hairy cell leukemia, a rare type of indolent B-cell lymphoma. We found that the bone marrow and left inguinal lymph node were non-homologous. There are no known reports of super-aged patients with two types of lymphoma simultaneously. The toxicity of R-CHOP in elderly people limited its usage, so we first chose rituximab. However, this approach was not successful. We then considered the Bruton tyrosine kinase (BTK) inhibitor, but its use was limited due to high blood pressure. Finally, we administered venetoclax, which the patient took for 2 years. The results of the routine blood examination were close to normal and no enlarged superficial or abdominal lymph nodes were observed.This is the oldest reported patient with two types of malignant lymphatic diseases. Additionally, this rare case suggests that targeted therapy can be more effective and safe for super-aged individuals. To summarize, a 95-year-old man diagnosed with two types of lymphomas, high-grade B-cell lymphoma and hairy cell leukemia, was successfully treated with venetoclax after other treatments failed. This case suggests that targeted therapy can be effective and safe for super-aged patients with multiple malignant lymphatic system diseases.

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