A case of pulmonary mucosa-associated lymphoid tissue lymphoma with plasmacytic differentiation and amyloid deposition: case report and literature review

Mucosa-associated lymphoid tissue (MALT) lymphoma is a relatively uncommon subtype of non-Hodgkin lymphoma which occurs anywhere but lymph nodes. We present a case of MALT lymphoma with plasmacytic differentiation and amyloid deposition. Although plasmacytic differentiation is shown in some cases, amyloid deposition is the rare one in the current cases we collected. Amyloidosis is often associated with some malignant diseases, but MALT is known as an indolent lymphoma. We want to report this case to raise pathologists' cognizance on this disease.