Electrodiagnostic Biomarkers in Paraneoplastic Retinopathy

Area of Science:

• Ophthalmology
• Oncology
• Neuroscience

Background:

• Paraneoplastic retinopathy (PNR) is an autoimmune condition causing rapid vision loss.
• It results from cross-reactivity between tumor antigens and retinal proteins.
• Early diagnosis and treatment are crucial for preserving vision.

Purpose of the Study:

• To identify electrodiagnostic biomarkers for diagnosing PNR.
• To evaluate the effectiveness of treatments for PNR.

Main Methods:

• Retrospective observational case-controlled study.
• Involved 25 patients with suspected PNR (11 diagnosed).
• Utilized comprehensive ophthalmologic examinations and electrodiagnostic tests (ERG, mfERG).

Main Results:

• PNR patients exhibited central vision loss and retinal atrophy.
• Electroretinography (ERG) showed severely attenuated responses.
• Multifocal ERG (mfERG) revealed reduced central and paracentral responses.
• Rituximab therapy showed potential in halting PNR progression.

Conclusions:

• Electrodiagnostic biomarkers can aid in the prompt recognition of PNR.
• Investigating visual field deterioration in cancer patients for PNR is essential.
• Therapeutic interventions may help manage PNR and preserve vision.