This is a summary of the study in question. Not to be an alarmist but as Twitchy Doc said some doctors are willing to test for these tumor marker by doing what is called a paraneoplastic blood series and yes he is correct in the fact that if you test positive for 1 or some that it COULD predate a tumor by up to 4 yrs if a tumor is not immediately found. Let me say it again....IT COULD!!! I guess it is at the neuros discretion and not in any way in my opinion does this reflect his intelligence.Neurology. 2011 Jan 11;76(2):172-8.Peripheral nerve hyperexcitability: a clinical and immunologic study of 38 patients.Rubio-Agusti I, Perez-Miralles F, Sevilla T, Muelas N, Chumillas MJ, Mayordomo F, Azorin I, Carmona E, Moscardo F, Palau J, Jacobson L, Vincent A, Vilchez JJ, Bataller L.SourceDepartment of Neurology, Hospital Universitari La Fe, Avenida de Campanar 21, 46009 Valencia, Spain.AbstractOBJECTIVE: We studied a case series of peripheral nerve hyperexcitability (PNH) aiming to describe clinical characteristics, immunologic and cancer associations, antibodies against neuronal antigens (voltage-gated potassium channel antibodies [VGKC-Abs] and other), and muscle biopsy findings.METHODS: Patients presenting with clinical and electrophysiologic signs of PNH were selected. We studied clinical and electrophysiologic features; a panel of non-neuronal organ-specific antibodies, immunofluorescence on rat nervous tissues, and radioimmunoprecipitation for VGKC-Abs; and muscle biopsies.RESULTS: Thirty-eight patients were included. After the exclusion of 6 cases with axonopathy of known origin, patients were subdivided according to the presence of electrophysiologic findings of motor axonopathy and association with cancer: axonopathic-PNH (group A: 12 patients), isolated nonparaneoplastic PNH (group B: 16 patients), and isolated paraneoplastic PNH (3 with thymoma and myasthenia gravis, 1 with thyroid carcinoma). PNH clinical features were similar in groups A and B. We found an overall high prevalence of clinical autoimmunity (33% of group A and 63% of group B) and systemic non-neuronal autoantibodies (42% of group A and 75% of group B). However, VGKC-Abs were only positive in 2 patients of group B. Ten patients underwent muscle biopsy, which showed inflammatory changes in 2 cases and nonspecific myopathic features in 8.CONCLUSIONS: PNH is a heterogeneous disorder involving the peripheral nerves in patients with a high propensity for developing autoimmunity. Associated muscle diseases are frequent in the form of myositis, myasthenia gravis, or nonspecific myopathic pathologic findings. VGKC-Abs were uncommon in this series.PMID: 21220721 [PubMed - indexed for MEDLINE]