Paraneoplastic neurological syndromes (PNS) are the remote effects of cancer on the nervous system. These may affect the nervous system from cerebral cortex to neuromuscular junction and muscle, causing damage to one or multiple areas. Among the various papraneoplastic neuropathies, the classical syndrome of PNS is subacute sensory neuronopathy involving the sensory neuron cell bodies in the dorsal root ganglia. In general, cases with paraneoplastic sensory neuronopathy are associated with small cell lung cancer. The authors experienced a case of an atypical unilateral paraneoplastic sensory neu-ronopathy associated with primary breast adenocarcinoma and lung metastasis, which is worthy of reporting.

Introduction
 Case report
 Discussion
 Acknowledgements
 References

• Jung Hun Kang(Department of Rehabilitation Medicine, Chosun University Hospital) Corresponding author
• Yong Han(Department of Rehabilitation Medicine, Chosun University Hospital)