Medicine General 35f54eac The dreaded complication of Rituximab is: A Progressive multifocal leukoencephalopathy B AIDP C Bone marrow suppresion D Cardiac toxicity High-Yield Explanation The dreaded complication of Rituximab is progressive multifocal leukoencephalopathy Ref: Harrison's principles of internal medicine, 18th edition ; Page 882.