Case Report: Neuronal intranuclear inclusion disease mimicking recurrent stroke in the setting of intracranial stenosis - Summary - MDSpire

Case Report: Neuronal intranuclear inclusion disease mimicking recurrent stroke in the setting of intracranial stenosis

  • By

  • Jingmin Zhao

  • Guangxun Shen

  • Lumei Chi

  • May 20, 2026

  • 0 min

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Objective:

To highlight the diagnostic challenges of neuronal intranuclear inclusion disease (NIID) presenting as recurrent stroke-like episodes, particularly in the context of intracranial atherosclerotic stenosis, and their impact on patient management.

Key Findings:
  • The 'ribbon sign' on diffusion-weighted imaging is a key diagnostic indicator for NIID, suggesting a need for heightened awareness among clinicians.
  • Recurrent stroke-like episodes can occur in NIID, complicating diagnosis when coinciding with vascular stenosis, necessitating careful differential diagnosis.
  • A tissue biopsy can provide definitive diagnosis when genetic testing is inconclusive, underscoring the importance of a comprehensive diagnostic strategy.
Interpretation:

The case underscores the importance of recognizing NIID in patients with recurrent stroke-like symptoms, particularly when typical vascular risk factors are absent, which may alter management strategies.

Limitations:
  • The case is based on a single patient, limiting generalizability and necessitating further studies.
  • The diagnosis relies on specific imaging and biopsy findings, which may not be universally available, highlighting the need for broader diagnostic criteria.
Conclusion:

This case emphasizes the need for awareness of NIID as a potential mimic of ischemic stroke and the critical role of targeted diagnostic approaches, suggesting areas for future research.

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