Cardiac arrest due to anti-NMDAR encephalitis associated with ovarian teratoma

Authors

  • Begoña Zalba-Etayo Intensive Care Unit, Lozano Blesa University Clinical Hospital, Zaragoza, Spain https://orcid.org/0000-0002-2290-4807
  • Olga Marín-Casajus Intensive Care Unit, Lozano Blesa University Clinical Hospital, Zaragoza, Spain
  • José Luis Cabrerizo-García Internal Medicine Service, Lozano Blesa University Clinical Hospital, Zaragoza, Spain

DOI:

https://doi.org/10.32818/reccmi.a11n1a7

Keywords:

anti-NMDAR encephalitis, ovarian teratoma, adolescence, PCR, immunotherapy, dysautonomia

Abstract

Anti-NMDAR encephalitis is a severe autoimmune disease frequently associated with ovarian teratoma in young women.
It is characterized by initial neuropsychiatric symptoms that can progress to catatonia, abnormal movements,
seizures, and severe dysautonomia. We present the case of a 17-year-old patient with anti-NMDAR encephalitis associated
with ovarian teratoma who developed severe catatonia, rigidity, and dysautonomia with apneas, requiring
admission to the ICU where she suffered a cardiorespiratory arrest. She was treated with stepwise immunotherapy
(methylprednisolone, immunoglobulins, rituximab, and cyclophosphamide) and laparoscopic oophorectomy, with
a favorable outcome and functional recovery. This case highlights the importance of early diagnosis, early identification
of dysautonomia, and the need for a multidisciplinary approach to improve prognosis.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Dalmau J, Gleichman AJ, Hughes EG, Rossi JE, Peng X, Lai M, et al. Anti-NMDA-receptor encephalitis: case series and analysis of the effects of antibodies. Lancet Neurol. 2008; 7(12): 1091 1098. doi: https://doi.org/10.1016/S1474-4422(08)70256-5 (último acceso abr. 2026). DOI: https://doi.org/10.1016/S1474-4422(08)70224-2

Titulaer MJ, McCracken L, Gabilondo I, Armangué T, Glaser C, Iizuka T, et al. Treatment and prognostic factors for long-term outcome in patients with anti-NMDA receptor encephalitis: an observational cohort study. Lancet Neurol. 2013; 12(2): 157 165. doi: https://doi.org/10.1016/S1474-4422(12)70310-1 (último acceso abr. 2026). DOI: https://doi.org/10.1016/S1474-4422(12)70310-1

Graus F, Titulaer MJ, Balu R, Benseler S, Bien CG, Cellucci T, et al. A clinical approach to diagnosis of autoimmune encephalitis. Lancet Neurol. 2016; 15(4): 391 404. doi: https://doi.org/10.1016/S1474-4422(16)00044-8 (último acceso abr. 2026). DOI: https://doi.org/10.1016/S1474-4422(15)00401-9

Wu CY, Wu JD, Chen CC. The Association of Ovarian Teratoma and Anti-N-Methyl-D-Aspartate receptor encephalitis: an updated integrative review. Int J Mol Sci. 2022; 22(20): 10911. doi: https://doi.org/10.3390/ijms222010911 (último acceso abr. 2026). DOI: https://doi.org/10.3390/ijms222010911

Nosadini M, Thomas T, Eyre M, Anlar B, Armangué T, Benseler SM, et al. International consensus recommendations for the treatment of pediatric NMDAR antibody encephalitis. Neurology. 2023; 100: e1 e16. doi: https://doi.org/10.1212/WNL.0000000000208007 (último acceso abr. 2026). DOI: https://doi.org/10.1212/WNL.0000000000208007

Banach W, Banach P, Szweda H, Wiśniewski A, Andrusiewicz M, Gurynowicz I, et al. Ovarian teratoma associated anti-NMDAR encephalitis in women with first time neuropsychiatric symptoms: a meta-analysis and systematic review. J Neuroimmunol. 2024; 402: 578865. doi: https://doi.org/10.1016/j.jneuroim.2024.578865 (último acceso abr. 2026). DOI: https://doi.org/10.1016/j.heliyon.2024.e36042

Liu X, Li Y, Chen J, Wang H, Zhang L, Zhao H. Anti-NMDAR encephalitis with delayed ovarian teratoma in a young woman: acase report with 5 years of follow-up. BMC Neurol. 2024; 24: 377. doi: https://doi.org/10.1186/s12883-024-03777-3 (último acceso abr. 2026). DOI: https://doi.org/10.1186/s12883-024-03891-x

Wang J, Li Q, Chen Y, Zhang Z. Surgical procedures and plasma exchange for ovarian teratoma associated anti N-Methyl-D-Aspartate receptor encephalitis: a case report and review of literature. Front Oncol. 2023; 13: 1238087. doi: https://doi.org/10.3389/fonc.2023.1238087 (último acceso abr. 2026). DOI: https://doi.org/10.3389/fonc.2023.1238087

Deng R, Tan X, Tian J, Tian S, Liu B, He J, Liu Y. Recurrent epilepsy 14 days after surgery in teratoma associated anti NMDAR encephalitis: a case report. SN Compr Clin Med. 2025; 7: 148. doi: https://doi.org/10.1007/s42399-025-01914-3 (último acceso abr. 2026). DOI: https://doi.org/10.1007/s42399-025-01914-3

Abe KK, Koli RL, Yamamoto LG. Emergency department presentations of anti-N-methyl-D-aspartate receptor encephalitis. Pediatr Emerg Care. 2016; 32: 107-112. Doi: https://doi.org/10.1097/pec.0000000000000713 (último acceso abr. 2026). DOI: https://doi.org/10.1097/PEC.0000000000000713

Nha PB, Tu NP, Ha NV, Hien DTT, Phuong NTT, Son NA, Hoang NT. Anti-NMDA receptor autoimmune encephalitis associated with ovarian teratoma: a case series and literature review. Int J Gynaecol Obstet. 2025; 169(1): 23-30. doi: https://doi.org/10.1002/ijgo.16028 (último acceso abr. 2026). DOI: https://doi.org/10.1002/ijgo.16028

Olivé-Cirera G, Fonseca E, Chen LW, Fetta A, Martínez-Hernández E, Guasp M, et al. Differential diagnosis and comparison of diagnostic algorithms in children and adolescents with autoimmune encephalitis in Spain: a prospective cohort study and retrospective analysis. Lancet Neurol. 2025; 24(1): 54-64. doi: https://doi.org/10.1016/S1474-4422(24)00443-5 (último acceso abr. 2026). DOI: https://doi.org/10.1016/S1474-4422(24)00443-5

Dalmau J, Armangué T, Planagumà J, Radosevic M, Mannara F, Leypoldt F, et al. An update on anti-NMDA receptor encephalitis for neurologists and psychiatrists. Lancet Neurol. 2019; 18(4): 389 402. doi: https://doi.org/10.1016/S1474-4422(19)30055-1 (último acceso abr. 2026). DOI: https://doi.org/10.1016/S1474-4422(19)30244-3

Published

2026-04-23

How to Cite

1.
Zalba-Etayo B, Marín-Casajus O, Cabrerizo-García JL. Cardiac arrest due to anti-NMDAR encephalitis associated with ovarian teratoma. Rev Esp Casos Clin Med Intern [Internet]. 2026 Apr. 23 [cited 2026 May 1];11(1):19-21. Available from: https://www.reccmi.com/RECCMI/article/view/1289