The Diagnostic and Treatment Challenges of Concomitant Mantle Cell Lymphoma and IgM Myeloma

It is rare for IgM multiple myeloma (MM) and mantle cell Benfotiamine lymphoma (MCL) to coexist.Furthermore, it is challenging to demonstrate if there are two distinct types of neoplasia or if plasma cell differentiation of MCL is present.We discuss the case of a patient concomitantly diagnosed with MCL and Baseball Toys IgM MM, and the subsequent diagnostic and management difficulties, and the positive treatment outcome.