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Vaginal epithelioid angiosarcoma: a potential pitfall in gynecologic pathology
Maxime Richer1, Maroie Barkati, Caroline Meunier
1Departments of 1Pathology and 2Radiation Oncology, Centre hospitalier de l'Université de Montréal, Hôpital Notre-Dame; Departments of 3Pathology and 4Obstetrics and Gynecology, Hôpital Maisonneuve-Rosemont; and 5Division of Gynecologic Oncology, Centre hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Montréal, Québec, Canada.
Epithelioid angiosarcoma of the vagina is a rare cancer easily misdiagnosed. Immunohistochemistry is crucial for diagnosing this aggressive vascular tumor.
Area of Science:
- Oncology
- Pathology
- Vascular Neoplasms
Background:
- Epithelioid angiosarcoma of the vagina is a rare entity.
- It is often misdiagnosed as a more common epithelial neoplasm.
- Early and accurate diagnosis is critical for patient outcomes.
Observation:
- A case report of a 41-year-old woman with three vaginal lesions is presented.
- The lesions were characterized by epithelioid cells with high-grade nuclei.
- No prior history of irradiation was noted.
Findings:
- Immunohistochemistry revealed expression of vascular markers (CD31, CD34, factor VIII, Fli-1) and WT-1.
- Focal positivity for Keratin 8/18 was observed.
- The tumor was negative for other cytokeratins, S100, HMB-45, myogenin, desmin, and human herpesvirus type 8; HPV testing was also negative.
Implications:
- A comprehensive immunohistochemical panel is essential for the correct diagnosis of vaginal epithelioid angiosarcoma.
- Distinguishing this aggressive vascular tumor from epithelial neoplasms is key.
- This diagnostic approach aids in appropriate treatment planning for rare vaginal cancers.
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