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Case Report

Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report

  • Authors:
    • Edvina Galié
    • Rosaria Renna
    • Domenico Plantone
    • Andrea Pace
    • Mirella Marino
    • Bruno Jandolo
    • Tatiana Koudriavtseva
  • View Affiliations / Copyright

    Affiliations: Unit of Neurology, Regina Elena National Cancer Institute, Istituti Fisioterapici Ospitalieri, I‑00144 Rome, Italy, Institute of Neurology, Catholic University of Sacred Heart, I‑00168 Rome, Italy, Department of Pathology, Regina Elena National Cancer Institute, Istituti Fisioterapici Ospitalieri, I‑00144 Rome, Italy
  • Pages: 2716-2719
    |
    Published online on: July 29, 2016
       https://doi.org/10.3892/ol.2016.4922
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Abstract

Morvan's syndrome (MoS) is a rare, complex neurological disorder characterized by neuromyotonia, neuropsychiatric features, dysautonomia and neuropathic pain. The majority of MoS cases have a paraneoplastic aetiology, usually occurring prior to the diagnosis of the underlying tumour and showing improvement following its treatment. The present study reports the case of a 35‑year‑old Caucasian male patient who was diagnosed with stage IVA thymoma. Thymectomy, lung resection, diaphragmatic pleurectomy and pericardio‑phrenectomy were performed 6 months after neoadjuvant chemotherapy. The pathological evaluation revealed a type B2‑B3 thymoma with focal squamous differentiation. Two years later, the patient underwent new surgical treatment for a local recurrence of the same histological type, and 4 weeks later, the patient presented with complex neurological symptoms compatible with MoS, including neuromyotonia, neuropsychiatric features, dysautonomia and neuropathic pain. Electromyography was compatible with a diagnosis of neuromyotonia. Brain magnetic resonance imaging scan and tests for serum anti‑acetylcholine receptor, anti‑striated muscle antibodies and anti‑30‑kDa titin fragment antibodies were all negative, whereas tests for anti-voltage-gated potassium channel (VGKC)‑complex antibodies (333.3 pmol/l), anti‑leucine‑rich glioma inactivated protein 1 and anti-contactin-associated protein‑like 2 antibodies were positive. The patient underwent 3 cycles of intravenous administration of immunoglobulins (0.4 g/kg/day for 5 days every 4 weeks) with little clinical and electrophysiological improvement. We speculated that the late onset of the symptoms in the present patient may have been triggered by an increase in the serum level of anti‑VGKC antibody, which was caused by the surgery performed for the treatment of recurrent thymoma. To the best of our knowledge, the present report is the first case of MoS associated with this histological type of thymoma uncommonly occurring upon surgical treatment of recurrent thymoma.
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Copy and paste a formatted citation
Spandidos Publications style
Galié E, Renna R, Plantone D, Pace A, Marino M, Jandolo B and Koudriavtseva T: Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report. Oncol Lett 12: 2716-2719, 2016.
APA
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., & Koudriavtseva, T. (2016). Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report. Oncology Letters, 12, 2716-2719. https://doi.org/10.3892/ol.2016.4922
MLA
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., Koudriavtseva, T."Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report". Oncology Letters 12.4 (2016): 2716-2719.
Chicago
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., Koudriavtseva, T."Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report". Oncology Letters 12, no. 4 (2016): 2716-2719. https://doi.org/10.3892/ol.2016.4922
Copy and paste a formatted citation
x
Spandidos Publications style
Galié E, Renna R, Plantone D, Pace A, Marino M, Jandolo B and Koudriavtseva T: Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report. Oncol Lett 12: 2716-2719, 2016.
APA
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., & Koudriavtseva, T. (2016). Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report. Oncology Letters, 12, 2716-2719. https://doi.org/10.3892/ol.2016.4922
MLA
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., Koudriavtseva, T."Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report". Oncology Letters 12.4 (2016): 2716-2719.
Chicago
Galié, E., Renna, R., Plantone, D., Pace, A., Marino, M., Jandolo, B., Koudriavtseva, T."Paraneoplastic Morvan's syndrome following surgical treatment of recurrent thymoma: A case report". Oncology Letters 12, no. 4 (2016): 2716-2719. https://doi.org/10.3892/ol.2016.4922
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