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Type 1 diabetes and GAD65 limbic encephalitis: a case report of a 10-year-old girl

  • Ema Grilo EMAIL logo , Joana Pinto , Joana Serra Caetano , Helena Pereira , Patrícia Cardoso , Rita Cardoso , Isabel Dinis , Cristina Pereira , Isabel Fineza and Alice Mirante
Published/Copyright: April 26, 2016

Abstract

Limbic encephalitis is a rare neurological disorder that may be difficult to recognize. Clinical features include memory impairment, temporal lobe seizures and affective disturbance. We report the case of a 10-year-old girl with type 1 diabetes mellitus that presented with seizures, depressed mood and memory changes. The diagnosis of glutamic acid decarboxylase 65 (GAD65) mediated limbic encephalitis relied on cerebral magnetic resonance imaging lesions and high serological and cerebrospinal fluid GAD65-antibodies titers. High-dose steroidal therapy was started with clinical improvement. Relapse led to a second high-dose steroid treatment followed by rituximab with remission. A correlation between serum GAD65-antibodies levels and symptoms was found, demonstrating GAD65-antibodies titers may be useful for clinical follow-up and immunotherapy guidance. This report raises awareness of this serious neurological condition that may be associated with type 1 diabetes, underlining the importance of an early diagnosis and prompt treatment for a better prognosis.


Corresponding author: Ema Grilo, MD, Centro Hospitalar e Universitário de Coimbra, Hospital Pediátrico, Coimbra 3030, Portugal, Phone: +351 914140675

  1. Author contributions: The fist and corresponding author, Ema Grilo, is responsible for the first draft of the manuscript. All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.

  5. Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.

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Received: 2016-1-10
Accepted: 2016-3-7
Published Online: 2016-4-26
Published in Print: 2016-8-1

©2016 Walter de Gruyter GmbH, Berlin/Boston

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