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Oral Kaposi's sarcoma: a 10-year retrospective histopathologic study
J A Regezi1, L A MacPhail, T E Daniels
1Department of Stomatology, School of Dentistry, University of California, San Francisco 94143-0424.
Summary
Diagnosing early Kaposi
Area of Science:
- Oral pathology
- Dermatopathology
- Oncology
Background:
- Microscopic diagnosis of early Kaposi's sarcoma (KS) is challenging.
- Distinguishing KS from bacillary angiomatosis (BA) can be difficult due to similar appearances.
Purpose of the Study:
- To describe the clinical-pathologic spectrum of oral Kaposi's sarcoma.
- To identify distinct subtypes of oral KS.
- To differentiate oral KS from pyogenic granulomas.
Main Methods:
- Review of 120 oral KS biopsies (1981-1991).
- Comparison with 30 oral pyogenic granulomas.
- Immunohistochemical staining for CD34 antigen.
Main Results:
- Oral KS diagnosis confirmed; no BA cases found.
- Two distinct oral KS subtypes identified: macular (small spindle cells) and nodular (infiltrative vascular lesions).
- CD34 expression observed in spindle cells of both subtypes.
Conclusions:
- Oral Kaposi's sarcoma presents as two main clinical-pathologic types: macular and nodular.
- These subtypes exhibit distinct histopathologic features.
- CD34 staining aids in identifying KS spindle cells.