Carcinoid Tumor-Associated Paraneoplastic Polyneuropathy that Mimics Guillain-Barre Syndrome.

Paraneoplastic polyneuropathies are among the most common distal neurological complications of systemic cancer on the nervous system. All peripheral neuropathy types, such as demyelinating, axonal, motor, sensory, or autonomic, can present in association with cancer and can have a paraneoplastic etiology (1). Classical paraneoplastic peripheral neuropathy is typically a sensory neuropathy with subacute onset that can be seen in small-cell lung cancer patients (1,2). There are few studies mentioning the relationship between carcinoid tumors and neurological syndromes. These are generally studies on serotonin-associated myopathy (3,4). This paper presents the case of a patient with a carcinoid tumor having acute sensorimotor polyneuropathy and showing symptoms similar to Guillain–Barre syndrome.