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Bednar tumor: a report of two cases
Yoichi Yagi1, Koichi Ueda, Seichi Maruyama
1Department of Plastic and Reconstructive Surgery, Osaka Medical College, Takatsuki, Japan.
The Journal of Dermatology
|July 6, 2004
Summary
This study reports on two Japanese patients diagnosed with Bednar tumor, a pigmented variant of dermatofibrosarcoma protuberans. Histopathology confirmed typical features and CD34 positivity, indicating intermediate malignancy.
Area of Science:
- Dermatopathology
- Oncology
Background:
- Bednar tumor is a rare, pigmented variant of dermatofibrosarcoma protuberans.
- Dermatofibrosarcoma protuberans (DFSP) is an intermediate-grade soft tissue sarcoma.
Observation:
- Two Japanese patients presented with multilobular, pigmented tumors.
- Tumors exhibited irregular surfaces and firm nodules extending into subcutaneous tissue.
- The nodules were superficial and movable over deeper structures.
Findings:
- Histopathological examination revealed classic Bednar tumor features.
- Immunohistochemical analysis showed positive CD34 staining, characteristic of DFSP.
- These findings confirm Bednar tumor as a distinct variant of DFSP.
Implications:
- This case series contributes to understanding the clinical and histological presentation of Bednar tumor.
- Accurate diagnosis is crucial for appropriate management of this intermediate malignancy.
- Further research may elucidate the specific biological behavior and treatment strategies for Bednar tumor.