Korean J Dermatol.  2003 Apr;41(4):496-498.

A Case of Bednar Tumor

• Jeong YS
• Park YT
• Park TH
• Yoo JH
• Kim KJ

Abstract

Bednar tumor is an uncommon pigmented subtype of dermatofibrosarcoma protuberans(DFSP). The histopathological finding is characterized by a typical storiform pattern composed of spindle-shaped cells resembling DFSP except for the presence of melanin-containing cells scattered within the lesion. The origin of the spindle-shaped cells and melanin-containing cells within the tumor remains unknown. We report a case of Bednar tumor in a 26-year-old woman on the right shoulder which was presented as asymptomatic, firm, black-colored, 1x1.5 cm nodule over 2 years. Histologically, the proliferated spindle-shaped cells showed a cartwheel pattern and stained positively with CD34, similar to those of a common DFSP. The tumor was widely excised and there is no evidence of recurrence from follow-up of 6 months.

Keyword

Bednar tumor; Dermatofibrosarcoma protuberance

MeSH Terms

Adult
Dermatofibrosarcoma
Female
Follow-Up Studies
Humans
Recurrence
Shoulder