The development of both of ALCL and MM in the same patient one after another (metachronous) has been described in 3 cases.[3–5] While the synchronous development of ALCL and MM in the same patient was reported only in one case.[6] Here we reported another one in whom ALK-negative ALCL and IgD λ-type MM were diagnosed at the same time. The gene discussed is ALK; the disease is anaplastic large cell lymphoma.