Bednar tumour

Bednar tumour

A form of dermatofibrosarcoma protuberans (DFSP) that contains heavily pigmented (melanin) dendritic cells, which contrasts with dermatofibromas which contain haemosiderin pigment.
References in periodicals archive ?
We report a case of Bednar tumour occurring on the shoulder of a 29-year-old male.
Thus, a final diagnosis of Bednar tumour was rendered.
These include Bednar tumour, fibrosarcomatous, fibrosarcomatous with myoid/myofibroblastic change, myxoid, granular cell, palisaded, giant cell fibroblastoma, combined and indeterminate.
The histogenesis of Bednar tumour is controversial.
Histopathologically, Bednar tumour is characterised by scattered melanosome-containing dendritic cells within an otherwise typical DFSP.
Pigmented neurofibroma can be differentiated from Bednar tumour by more extensive storiform growth and strong positivity for CD34 in latter.
Unusual variants of DFSP include the Bednar tumour that is denoted by melanin- containing cell, myxoid DFSP that contains areas of interstitial mucin, and the atrophic type.