Radiographic Horizontal Conjugate Gaze Deviation: Clinical Correlates

Area of Science:

• Neurology
• Ophthalmology
• Radiology

Background:

• Radiographic, horizontal, conjugate gaze deviation (Rad h-CGD) has emerged as a potential marker for various neurologic and vestibular conditions since 2003.
• Over two decades, clinical correlates linking Rad h-CGD to supratentorial and infratentorial lesions have been identified.

Purpose of the Study:

• To elucidate the diagnostic value of Rad h-CGD in localizing and lateralizing neurologic and vestibular lesions.
• To provide clinicians and radiologists with a comprehensive understanding of Rad h-CGD's diagnostic possibilities for improved patient care.

Main Methods:

• Correlating measured angles of deviation in Rad h-CGD with clinical findings and underlying lesion mechanisms.
• Reviewing existing literature on lesion localization and integrating it with clinical experience.
• Developing a practical algorithm for interpreting Rad h-CGD findings.

Main Results:

• Rad h-CGD provides valuable diagnostic and localization information, potentially revealing subtle ocular findings.
• The clinical context is crucial as Rad h-CGD alone cannot differentiate between supratentorial and infratentorial lesions.
• Rad h-CGD can be associated with various conditions including large vessel occlusion strokes, acute vestibular syndrome, and ischemic events in the cerebellum, brainstem, or labyrinth.

Conclusions:

• Rad h-CGD is a useful tool for diagnosing and localizing neurologic and vestibular disorders.
• Integrating Rad h-CGD interpretation with clinical context enhances diagnostic accuracy.
• Further understanding of Rad h-CGD aids in managing a spectrum of central and peripheral nervous system conditions.