Determining Disease Activity and Glucocorticoid Response in Thyroid-Associated Ophthalmopathy: Preliminary Study...

Area of Science:

• Ophthalmology
• Radiology
• Endocrinology

Background:

• Thyroid-associated ophthalmopathy (TAO) is an autoimmune condition affecting the eye muscles.
• Assessing TAO activity and treatment response often relies on clinical assessments and imaging.
• Dynamic contrast-enhanced MRI (DCE-MRI) offers detailed insights into tissue perfusion and permeability.

Purpose of the Study:

• To evaluate the utility of DCE-MRI parameters of extraocular muscles (EOMs) in determining TAO activity.
• To assess the effectiveness of DCE-MRI in predicting treatment response to glucocorticoids (GCs).

Main Methods:

• Prospective enrollment of 65 patients with TAO (active and inactive groups).
• DCE-MRI analysis of EOMs using model-free (TTP, AUC) and model-based (Ktrans, Kep, Ve) parameters.
• Statistical analysis including logistic regression and ROC curve analysis to determine diagnostic performance.

Main Results:

• Active TAO patients showed significantly different DCE-MRI parameters (TTP, AUC, Ktrans, Ve) compared to inactive patients.
• DCE-MRI parameters (TTP-min, Ktrans-mean, Kep) differentiated GC-responsive from unresponsive patients.
• TTP-mean and Ve-mean predicted TAO activity (AUROC=0.687), while TTP-min and Ktrans-mean predicted GC response (AUROC=0.821).

Conclusions:

• DCE-MRI parameters of EOMs can aid in TAO evaluation.
• TTP-mean and Ve-mean are potential biomarkers for TAO activity assessment.
• TTP-min and Ktrans-mean show promise as biomarkers for predicting GC treatment response in TAO.