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Contribution on the ultrastructure of intraocular melanoblastomas
Advances in Ophthalmology = Fortschritte Der Augenheilkunde = Progres En Ophtalmologie
|January 1, 1978
Summary
This study examined nucleoli and intercellular spaces in intraocular melanoblastoma. Ruthenium red-positive material with a unique structure was found in intercellular gaps.
Area of Science:
- Ophthalmology
- Oncology
- Cell Biology
Background:
- Intraocular melanoblastoma is a rare malignant tumor of the eye.
- Understanding the ultrastructural characteristics of tumor cells is crucial for diagnosis and prognosis.
Purpose of the Study:
- To investigate the morphology of nucleoli and intercellular spaces in intraocular melanoblastoma.
- To characterize the composition and structure of material within intercellular gaps.
Main Methods:
- Electron microscopy was used to examine tissue samples from 10 cases of intraocular melanoblastoma.
- Ruthenium red staining was employed to visualize material in intercellular spaces.
Main Results:
- Nucleoli size ranged from 1.5-2.0 micrometers, with diverse morphologies observed.
- Intercellular spaces measured between 230-1,300 Angstroms.
- Ruthenium red-positive material, exhibiting a regular, filamentous structure with alternating electron-dense periods, was identified in these spaces.
Conclusions:
- The nucleolar and intercellular space characteristics in intraocular melanoblastoma are comparable to other tumors.
- The identified ruthenium red-positive material suggests a unique extracellular matrix component within the tumor.