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Late onset cerebellar ataxia syndrome after non-paraneoplastic Lambert-Eaton myasthenic syndrome: a case study.

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Neuromuscular Neurology, Advocate Health, 1850 Dempster Street, Park Ridge, IL, 60068, USA.

This is an unusual case of voltage gated calcium channel (VGCC) antibodies leading to two distinct and chronologically separated neurologic syndromes without the presence of an underlying neoplasm. Lambert Eaton Myasthenic Syndrome (LEMS) presented five years prior to cerebellar ataxia. Both LEMS and cerebellar ataxia were responsive to treatment, but not the same therapy.

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Background: Lambert-Eaton myasthenic syndrome (LEMS) is an autoimmune disorder of the presynaptic neuromuscular junction associated with antibody mediated dysfunction of voltage-gated calcium channels (VGCCs). LEMS can exist as a paraneoplastic syndrome, paraneoplastic-LEMS (P-LEMS), when associated with tumors, most commonly, small cell lung carcinoma (SCLC) or as a non-paraneoplastic condition (NP-LEMS) when no malignancies are detected.

Methods: A retrospective chart review was conducted in 3 tertiary hospitals in Saudi Arabia for patients diagnosed with LEMS between January 2010 and January 2020.

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Background: Paraneoplastic Neurological Syndromes (PNS) constitute a heterogeneous cluster of disease manifestations related to various cancers. Small Cell Lung Cancer (SCLC) is strongly related to PNS. This narrative review conducted a survey in the available PubMed literature to highlight the appearance of PNSs in SCLC cases and discuss published research highlights on the subject so that general practitioners can be acquainted with the medical phenomenon present in SCLC patients.

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This update starts with an interesting series of children and adults with congenital myasthenic syndrome with a DOK7 variant. The next section is on autoimmune myasthenia gravis (MG) epidemiology, cost of care, and hospitalizations. A number of studies on the newer treatments are discussed including a phase 2 trial of nipocalimab and recommendations for using some of these drugs.

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Pre-existing Lambert-Eaton Myasthenic Syndrome and Scleroderma in a Patient with Neuroendocrine Carcinoma Undergoing Immune Checkpoint Inhibitor Cancer Immunotherapy.

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Introduction: Paraneoplastic neurological syndromes (PNS) can worsen with immune checkpoint inhibitor (ICI) cancer immunotherapy.

Case Report: A 66-year-old female with paraneoplastic Lambert-Eaton Myasthenic Syndrome (LEMS), which led to the diagnosis of metastatic neuroendocrine carcinoma, was treated with intravenous immune globulin (IVIg) (with minimal response), chemotherapy, and radiation, resulting in neurological improvement. However, sclerodermatous changes developed after a year.

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