Angiosarcoma Revisited: Diagnostic Challenges and a 16-Year Retrospective Analysis from a Single Institution

Area of Science:

• Oncology
• Pathology
• Diagnostic challenges in rare tumors

Background:

• Angiosarcomas (AS) are rare, aggressive malignant tumors with significant histopathologic heterogeneity.
• This heterogeneity often leads to misdiagnosis, mimicking other neoplasms and complicating accurate identification.

Purpose of the Study:

• To evaluate the clinicopathological spectrum of angiosarcomas over a 16-year period.
• To emphasize the diagnostic challenges and strategies for accurate angiosarcoma identification.

Main Methods:

• Retrospective review of 11 histologically confirmed angiosarcoma cases.
• Data collection included demographics, clinical presentation, tumor location, histopathology, immunohistochemistry (IHC), treatment, and outcomes.

Main Results:

• Histologic patterns varied from low-grade vascular proliferations to poorly differentiated sarcomas.
• Immunohistochemical findings showed overlapping marker expression, including cytokeratin positivity and loss of H3K27me3, potentially leading to misdiagnosis.
• Morphologic features often resembled other vascular tumors like epithelioid hemangioendothelioma.

Conclusions:

• Angiosarcoma diagnosis is difficult due to morphologic variability and overlapping immunophenotypic profiles.
• Accurate diagnosis requires a multidisciplinary approach integrating clinical, radiologic, and pathologic data.
• Diagnostic vigilance and comprehensive evaluation are crucial for assessing vascular neoplasms.