Factors Associated With Relapse in Patients With Neurosarcoidosis.

Area of Science:

• Neuroimmunology
• Neurology
• Clinical Medicine

Background:

• Neurosarcoidosis affects 5-10% of sarcoidosis patients, posing a high risk of irreversible neurological damage.
• Rapid diagnosis, accurate prognostication, and tailored treatments are critical for managing neurosarcoidosis.
• This study aimed to identify factors predicting relapse in neurosarcoidosis patients.

Purpose of the Study:

• To identify factors associated with relapses in neurosarcoidosis.
• To improve prognostication and inform individualized treatment strategies.
• To explore the association between risk factors and therapeutic approaches.

Main Methods:

• A multicenter retrospective cohort study involving 174 patients across 6 European neuroimmunology centers.
• Evaluation of clinical presentation, imaging, cerebrospinal fluid (CSF) analysis, and immunosuppressive therapies.
• Analysis of relapse predictors using log-rank tests and Cox regression models, with a median follow-up of 24 months.

Main Results:

• Central nervous system (CNS) parenchymal lesions, CSF-specific oligoclonal bands (OCBs), low CSF glucose (<40 mg/dL), and high CSF protein (≥1,000 mg/dL) were identified as risk factors for relapse.
• Patients with 3-4 risk factors had significantly shorter relapse-free survival (12 months) compared to those with 1-2 (36 months) or no risk factors (120 months).
• The likelihood of treatment escalation increased with the number of risk factors, from 14.3% to 50%.

Conclusions:

• Specific risk factors, including parenchymal lesions and CSF abnormalities, enable better prognostication in neurosarcoidosis.
• The presence of multiple risk factors indicates a higher relapse risk, suggesting the need for more aggressive therapeutic strategies.
• These findings can guide individualized treatment approaches for neurosarcoidosis patients.