Immunoglobulin Light Chain (AL) Amyloidosis Preceding Marginal Zone Lymphoma: A Case Report.

Immunoglobulin light chain (AL) amyloidosis is a systemic disease in which different systems such as kidneys, heart, and lungs are affected by the deposition of amyloid, a form of fibrillary protein. Usually, it occurs in patients with pre-existing diagnoses of plasma cell dyscrasias and is rarely seen in the concurrence of marginal zone lymphoma (MZL). Earlier interventions with cyclophosphamide and dexamethasone in conjunction with newer therapies such as bortezomib, carfilzomib or lenalidomide, and pomalidomide are being used to treat patients with AL amyloidosis. In this report, we are presenting a unique case of a patient who was diagnosed with AL amyloidosis several years prior to presenting with a soft tissue mass, which was subsequently noted to be an amyloid mass within an MZL. Overall, the occurrence of AL amyloidosis and MZL is rare with less than 20 patients reported. The MZL developed prior to or simultaneously with AL amyloidosis in the reported cases. Therefore, to our knowledge, this is the first time systemic amyloidosis has preceded MZL.