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Capillary hemangioblastoma. An immunohistochemical study.
American Journal of Clinical Pathology
|October 1, 1986
Summary
The origin of stromal cells in capillary hemangioblastomas remains uncertain. Current markers indicate these cells are not of endothelial, pericytic, or astrocytic origin, despite some histiocytic marker positivity.
Area of Science:
- Neuropathology
- Vascular Biology
- Cell Biology
Background:
- Capillary hemangioblastomas are vascular tumors with stromal cells of uncertain origin.
- Previous studies yielded conflicting results regarding astrocytic and endothelial origins using glial fibrillary acidic protein (GFAP) and Factor VIII-related antigen (FVIIIR:Ag).
Purpose of the Study:
- To investigate the cellular origin of stromal cells in capillary hemangioblastomas.
- To differentiate between endothelial, pericytic, astrocytic, and histiocytic origins.
Main Methods:
- Immunohistochemical analysis using markers such as Ulex europaeus I lectin (UEAI) for endothelial cells.
- Employing antibodies for pericytes and various histiocytic markers.
- Utilizing glial fibrillary acidic protein (GFAP) as an astrocyte marker.
Main Results:
- Factor VIII-related antigen (FVIIIR:Ag) and UEAI were exclusively found in endothelial cells.
- Glial fibrillary acidic protein (GFAP) was detected only in entrapped astrocytes.
- Stromal cells showed positivity for some histiocytic markers, but a definitive histiocytic origin could not be established.
Conclusions:
- Current evidence does not support an endothelial, pericytic, or astrocytic origin for capillary hemangioma stromal cells.
- The origin of these stromal cells remains uncertain.
- Further research is needed to elucidate the precise cell lineage of stromal cells in these tumors.