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The AgNOR quantity as prognostic parameter in choroidal melanomas: a standardised analysis
G Tuccari1, J A Giménez-Mas, F Fedele
1Department of Human Pathology, University of Messina, Italy. tuccari@imeuniv.unime.it
Summary
Silver-stained nucleolar organizer region (AgNOR) protein quantity is a significant prognostic indicator for choroidal melanomas. Higher AgNOR values and larger tumor size correlate with a worse prognosis, independent of other factors.
Area of Science:
- Ophthalmology
- Oncology
- Cell Biology
Background:
- Choroidal melanomas are the most common primary intraocular malignancy.
- Accurate prognostic markers are crucial for patient management and treatment strategies.
Purpose of the Study:
- To evaluate the prognostic significance of silver-stained nucleolar organizer region (AgNOR) proteins in choroidal melanomas.
- To determine if AgNOR quantity can predict patient outcomes.
Main Methods:
- Standardized analysis of AgNORs on 34 formalin-fixed paraffin-embedded choroidal melanoma sections.
- Quantification of AgNORs using mean AgNOR area values (NORA) according to established guidelines.
- Statistical analysis including Kaplan-Meier survival curves and Cox multivariate analysis.
Main Results:
- Significantly higher NORA values were observed in non-spindle shaped cells, larger tumors, and cases with a worse clinical course.
- No correlation was found between AgNOR quantity and patient age, sex, or pigment amount.
- Higher NORA values (>3.327 µm²), non-spindle cell histotype, and increased tumor size were associated with a worse prognosis.
Conclusions:
- AgNOR quantity is a reliable independent prognostic variable for predicting the outcome of choroidal melanoma patients.
- AgNOR analysis provides valuable prognostic information beyond traditional metrics like tumor size.