Nervous system dysfunction in Waldenström's macroglobulinemia: response to treatment

Area of Science:

• Neurology
• Immunology
• Hematology

Background:

• Waldenstrom's macroglobulinemia (WM) is a rare B-cell lymphoproliferative disorder.
• Peripheral neuropathy is a known complication of WM, often associated with anti-myelin-associated glycoprotein (MAG) antibodies.
• Parkinsonism is an uncommon but reported neurological manifestation of WM.

Observation:

• A patient with WM presented with peripheral neuropathy and high anti-MAG antibody titers.
• The patient subsequently developed parkinsonism refractory to levodopa treatment.
• Conventional therapies for WM were ineffective in managing the neurological symptoms.

Findings:

• Autologous bone marrow transplantation (ABMT) led to significant improvement in the patient's peripheral neuropathy.
• The parkinsonism symptoms, however, did not improve following ABMT.
• This suggests a differential response of neurological complications to intensive therapy.

Implications:

• Aggressive reduction of the malignant B-cell clone may be crucial for ameliorating anti-MAG antibody-mediated neuropathy in WM.
• The persistent parkinsonism despite B-cell cytoreduction indicates distinct pathomechanisms or resistance in different neurological manifestations of WM.
• Further research is needed to understand the specific drivers of neurological dysfunction in WM and optimize treatment strategies.