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Recovery estimates and prognostic factors for oculomotor nerve palsy
Daniel Lucio Willing1, Alice Giotta Lucifero2,3, Marcos Devanir Silva da Costa1
1Universidade Federal de São Paulo, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brazil.
Arquivos De Neuro-Psiquiatria
|August 13, 2026
Summary
Third cranial nerve (III CN) palsy recovery depends on its cause. Patient age, pupillary involvement, and hypertension significantly predict better outcomes in this disabling condition.
Area of Science:
- Neurology
- Ophthalmology
- Clinical Neuroscience
Background:
- Third cranial nerve (III CN) palsy presents diverse etiologies and onset patterns, significantly impacting patient function.
- Identifying causes and risk factors is crucial for prognosis and effective treatment strategies.
Purpose of the Study:
- To investigate factors associated with third cranial nerve palsy.
- To estimate recovery rates across various etiologies.
- To identify independent predictors of recovery, including patient characteristics and comorbidities.
Main Methods:
- Retrospective analysis of neurological data from patients with III CN palsy (2010 onwards).
- Neurological examination, neuroimaging, and follow-up were conducted.
- Kaplan-Meier curves, log-rank tests, and logistic regression analyzed recovery rates and predictors.
Main Results:
- Microangiopathy and miscellaneous causes were the most frequent etiologies (36% each).
- Hypertension (50%), diabetes (34%), and cardiovascular disease (14%) were common comorbidities.
- Overall recovery was 46%; microangiopathy and syndromes predicted faster recovery. Age and pupillary involvement were independent prognostic factors.
Conclusions:
- Etiology significantly impacts oculomotor function recovery.
- Patient age, pupillary involvement, and hypertension are key predictors of favorable outcomes.
- Further research is needed to validate these findings for clinical integration.