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Malignant tumors in autoimmune encephalitis with anti-NMDA receptor antibodies
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Malignant tumors in autoimmune encephalitis with anti-NMDA receptor antibodies
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Malignant tumors in autoimmune encephalitis with anti-NMDA receptor antibodies
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Journal Article
Malignant tumors in autoimmune encephalitis with anti-NMDA receptor antibodies
2018
Overview
ObjectiveThe aim of this study was to describe specificities of patients with NMDA receptor antibody (NMDAR-Ab) encephalitis associated with a malignant tumor.MethodsRetrospective observational study of 252 patients with NMDAR-Ab encephalitis of the French Paraneoplastic Neurological Syndrome Reference Center. Patients were classified in three groups: (1) non-malignant ovarian teratomas, (2) malignant ovarian teratomas (immature), and (3) other malignant tumors.ResultsSixty patients (23.8%) had an associated tumor and 15 (6%) were malignant. No particular neurological symptom was observed in these patients. Ovarian teratomas were the most frequent (51 cases) with 6 of them immature (11.8% of teratomas). Nine patients (3.6%) developed other malignant tumors (3 small cell lung carcinomas, 1 uterine adenocarcinoma, 1 prostate adenocarcinoma, 1 Hodgkin lymphoma, 1 pineal dysgerminoma, 1 neuroblastoma and 1 pancreatic neuroendocrine tumor). Among patients with a cancer other than teratoma, 6/9 were elderly patients (median age 65 years, representing 30% of elderly patients with such encephalitis) compared to a median age of 26 years in adult patients included herein. The clinical course was similar in the three groups, other than a higher death rate among patients with malignant tumors (86 versus 2%; p < 0.001) mainly due to tumor progression (5/7 deaths).ConclusionImmature ovarian teratomas represent 11.8% of all teratomas in patients with NDMAR-Ab encephalitis. The other malignant tumors are mainly observed in elderly patients. The presence of a malignant tumor does not impact the neurological presentation but is directly associated with a higher risk of death.
Publisher
Springer Nature B.V
Subject
