IL34 and AL amyloidosis: Interestingly, we and others recently reported the IL‐34 expression in haematological malignancies such as adult T‐cell leukaemia/lymphoma18 and multiple myeloma.19 Here, we show that IL‐34 is also expressed in approximately 36% of lymphoma tissues of patients with diffuse large B‐cell lymphoma (DLBCL).