By Gary M. White, MD
The Bednar tumor (BT) is a rare variant of dermatofibrosarcoma protuberans (DFSP) with melanin pigment in cells histologically.
- The BT represents 1-5% of all DFSPs.
- Any age but predominantly middle-aged adults. Equal sex ratio.
- In a review of 131 cases [JAAD 2016;75;1064], the BT was more likely to be found in African Americans and was more likely to occur on the extremities (classic DFSP most commonly occurs on the trunk). The incidence peaked in the 35-39 year old age group.
A slow growing nodule, mass, or firm plaque on the trunk is typical. Metastases can occur, but rarely.
Mohs micrographic surgery is the treatment of choice. See dermatofibrosarcoma protuberans.
Tumor growing for 5 years. Indian J Dermatol 2015;60:107
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