Neurolymphomatosis, defined as invasion of cranial nerves and peripheral nerve roots, plexus or nerves by Non Hodgkin's Lymphoma is a very rare clinical entity. We describe a case of 69 years old gentleman, who presented to us with asymmetric, painful sensorimotor polyneuropathy. He was admitted with 2 months history of dry cough, constitutional symptoms, paraesthesias on right side of face along with painful asymmetrical quadriparesis. Nerve conduction studies were sugges- tive of asymmetrical sensorimotor axonal and demyelinating neuropathy. Cerebrospinal fluid ana- lysis revealed mild pleocytosis with raised protein. FDG-PET showed intense uptake in both adre- nals, abdominal lymph nodes, sacral nerve roots and brachial plexus. Fine needle aspiration cyto- logy of adrenal mass revealed evidence of diffuse large B cell Non Hodgkin's Lymphoma. As patient succumbed to illness, an autopsy was done, which revealed diffuse large B cell lymphoma involv- ing adrenals, brachial and lumbosacral plexuses. Our report provides important insights into a rare cause of painful demyelinating multiple mononeuropathy and emphasises on increasing role and diagnostic utility of PET imaging in evaluation of patients presenting with multiple mononeu- ropathy, especially with regards to paraneoplastic or neoplastic causes such as lymphoma. * Corresponding author.