When a bruise gets important: Bednar tumour

Almeida, Filipa Tavares; Carvalho, Sofia Daniela; Pereira, Teresa; Brito, Celeste

doi:10.1136/bcr-2018-228446

Cited by 3 publications

(4 citation statements)

References 3 publications

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Section: Discussionmentioning

confidence: 55%

“…The same feature was present in a case of pigmented dermatofibrosarcoma described by Ehara et al [ 4 ]. Lastly, Almeida et al described another case of Bednar tumor which showed pigmented network, whitish-blue veil, blurry branching vessels and white streaks as principal dermoscopic patterns [ 5 ]. The pathologic features of pigmented dermatofibrosarcoma easily correlate to these aforementioned dermatoscopic findings: blue-whitish veil is due to pigmented spindle cells while white streaks are caused by altered collagen fibers.…”

Section: Discussionmentioning

confidence: 99%

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Dermoscopy of a BednarTumor: New Case and Review of the Literature

Maione

Rosa

Miccio

et al. 2023

Dermatol Pract Concept

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Section: Discussionmentioning

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Dermoscopy of a BednarTumor: New Case and Review of the Literature

Maione

Rosa

Miccio

et al. 2023

Dermatol Pract Concept

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“…There is an increased awareness that fibrosarcoma or even pleomorphic sarcoma can arise from such low-grade malignant skin tumors [4,5,15]. This implies a more aggressive clinical behavior of the lesion, and it appears that these patients have a higher risk of developing distant metastases [13,15,16].…”

Section: Discussionmentioning

confidence: 99%

“…In the recent years, several types of DFSP have been described such as atrophic, fibrosarcomatous, giant cell fibroblastomatous, myxoid, myoid and pigmented variant [2][3][4]. This latter one is also known as Bednar tumor and is one of the rarest forms of DFSP, representing less than 5% of all cases, and being most often found on the back and shoulders [5,6]. Its clinical features are usually uncharacteristic.…”

Section: Introductionmentioning

confidence: 99%

When an old pigmented lesion becomes serious: the problematic diagnosis of low-grade skin malignancies – Bednar tumor with fibrosarcomatous transformation

Dumitru

Ciongariu

Aliuș

et al. 2021

Romanian Journal of Orthopaedic Surgery and Traumatology

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Bednar tumor is a rare cutaneous neoplasm, regarded as a variant of dermatofibrosarcoma protuberans with melanotic colonization and it usually affects young and middle-aged adults or children. This lesion is considered a low-grade malignant tumor, which can be associated with multiple local recurrences after surgical excision. Although a rare phenomenon, these lesions may undergo fibrosarcomatous transformation, which implies a poorer prognosis of the disease, as the tumor has a more locally aggressive behavior and patients might also develop distant metastases. We present the case of a 53-year-old female patient, with no significant medical history, who presented with a subcutaneous nodule on her upper back, for which a wide surgical excision was performed. The gross examination of the specimen showed a solitary protuberant grey-white nodule with a bluish shade and flecked with pigment. The microscopic examination revealed a malignant proliferation with a predominantly fascicular growth pattern, composed of spindle cells with highly pleomorphic nuclei and high mitotic rate, as well as the presence of dendritic cells with abundant melanin. Upon immunohistochemical analysis, the proliferation showed negative staining for CD 34 and AE 1/3, whereas the scattered dendritic cells stained positive with S100 protein. Ki 67 was positive in 15% of the tumor cells and the absence of p53 expression was noted. Thus, the diagnosis of Bednar tumor with fibrosarcomatous transformation was established. The aim of this paper was to gain further knowledge about the histopathological and immunohistochemical features, as well as about the treatment of Bednar tumor, especially considering its rarity.

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Pigmented dermatofibrosarcoma (Bednar tumour) of scalp

Agarwal,

Rana

2023

BMJ Case Rep

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Pigmented dermatofibrosarcoma protuberans (DFSP) also known as Bednar tumour is a very rare variant of DFSP which is considered to be of intermediate grade along with the presence of melanin-containing dendritic cells. Only a handful of cases have been described in the literature so far. It is centred around the dermis or subcutis and can pose a diagnostic challenge by being confused with other pigmented lesions of the skin. We hereby report one such unusual case of a man in his late 20s presenting with swelling over the forehead for the past 7 years. Hence a diagnosis of pigmented DFSP should always be considered while reporting pigmented subcutaneous lesions with spindle cell morphology.

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When a bruise gets important: Bednar tumour

Cited by 3 publications

References 3 publications

Dermoscopy of a BednarTumor: New Case and Review of the Literature

Dermoscopy of a BednarTumor: New Case and Review of the Literature

When an old pigmented lesion becomes serious: the problematic diagnosis of low-grade skin malignancies – Bednar tumor with fibrosarcomatous transformation

Pigmented dermatofibrosarcoma (Bednar tumour) of scalp

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