Search results for "Dermatofibrosarcoma"

Molecular diagnosis of dermatofibrosarcoma protuberans: A comparison between reverse transcriptase-polymerase chain reaction and fluorescence in situ…

2011

Dermatofibrosarcoma protuberans (DFSP) is characterized by the presence of the t(17;22)(q22;q13) that leads to the fusion of the COL1A1 and PDGFB genes. This translocation can be detected by multiplex reverse transcriptase-polymerase chain reaction (RT-PCR) or fluorescence in situ hybridization (FISH) techniques. We have evaluated the usefulness of a dual color dual fusion FISH probe strategy for COL1A1/PDGFB detection in a series of 103 archival DFSPs and compared the obtained results with RT-PCR analyses. FISH and RT-PCR were carried out on paraffin embedded tissue samples. Regarding the RT-PCR approach, all COL1A1 exons and exon 2 of PDGFB were evaluated. Sensitivity, specificity, positi…

Dermatofibrosarcoma protuberans: clinical, pathological, and genetic (COL1A1-PDGFB ) study with therapeutic implications.

2009

Aims:  To analyse the presence of collagen type I alpha 1–platelet-derived growth factor beta (COL1A1–PDGFB) transcripts in 20 cases of dermatofibrosarcoma protuberans (DFSP) and to assess the relationship between COL1A1 breakpoints and clinical and histopathological variables. Methods and results:  Multiplex reverse transcriptase-polymerase chain reaction was carried out using frozen tissue. Our series contained 14 men and six women. Histologically, most cases were of conventional type (n = 9), followed by fibrosarcoma (n = 4), Bednar tumour (n = 2), sclerosing (n = 2), myoid (n = 1) and atrophic (n = 1) DFSP, and giant cell fibroblastoma (n = 1). Immunohistochemistry revealed CD34 express…

Congenital dermatofibrosarcoma protuberans: 30 years of follow-up

2007

Summary Dermatofibrosarcoma protuberans (DFSP) is a rare fibrohistiocytic tumor that commonly appears in adult patients. Few cases of DFSP in childhood have been reported. We describe a case of congenital DFSP that had been incompletely excised in childhood, and again at 28 years of age. The 33-year-old woman presented with a recurrence. When comparing the histologic features of the previous specimens excised in 1970 and 30 years later, the similar typical storiform pattern of fibromatous cells was found. The small number of proliferation-marker-positive cells was not altered over the course of 30 years. In line with a few additional reports, we suggest that congenital dermatofibrosarcoma p…

Atrophic dermatofibrosarcoma protuberans with the fusion gene COL1A1-PDGFB

2008

Biphasic dermatofibrosarcoma protuberans with a labyrinthine plexiform high‐grade fibrosarcomatous transformation

2013

Several variants of dermatofibrosarcoma protuberans, a low-grade superficial sarcoma, are well recognized. The most prognostically important is the fibrosarcomatous variant. We report a case of biphasic dermatofibrosarcoma protuberans in which the high-grade component exhibited a previously undescribed plexiform pattern. A clinicopathological study complemented with immunohistochemical, ultrastructural, reverse transcription polymerase chain reaction and fluorescence in situ hybridization analyses of this unique case. Histopathologically, a conventional low-grade dermatofibrosarcoma protuberans was admixed with intratumoral high-grade areas showing a striking labyrinthine plexiform pattern …

Reply to "More evidence that genetic profiling will delineate the nosology and biologic potential of fibrohistiocytic tumors in the dermatofibrosarco…

2013

Nonepithelial skin tumors with multinucleated giant cells

2013

Recognition of the different types of multinucleated giant cells in neoplastic and pseudotumoral lesions of the skin may be helpful in the differential diagnosis of these tumors. In this review, we will analyze the different types of multinucleated giant cells that can be found in nonepithelial cutaneous tumors and, more importantly, the clinicopathological context in which they are found. Touton giant cells are typically present in juvenile xanthogranuloma, necrobiotic xanthogranuloma, and some subtypes of xanthomas. Giant cells with a ground glass appearance are typically present in the solitary reticulohistiocytoma and multicentric reticulohistiocytosis. Osteoclast-like cells are found i…

Dermatofibrosarcoma protuberans: a comprehensive review and update on diagnosis and management

2013

Dermatofibrosarcoma protuberans (DFSP) is a rare superficial tumor characterized by high rates of local recurrence and low risk of metastasis. DFSP occurs most commonly on the trunk and proximal extremities, affects all races, and often develops between the second and fifth decade of life. The tumor grows slowly, typically over years. Histologically, several variants of DFSP have been described and should be well characterized to avoid misdiagnosis with other tumors. These include pigmented (Bednar tumor), myxoid, myoid, granular cell, sclerotic, atrophic DFSP, giant cell fibroblastoma, and DFSP with fibrosarcomatous areas. Of all these variants, only the DFSP with fibrosarcomatous areas is…

Dermatofibrosarcoma protuberans: estudio de factores pronósticos

2012

Introducción: El dermatofibrosarcoma protubernas (DFSP) es un tumor cutáneo de malignidad intermedia clasificado dentro de los tumores fibrohistiocíticos que tiene una alta tasa de recidivas locales tras extirpaciones con cirugía convencional pero baja capacidad de producir metástasis. Hipótesis: Existen determinadas características del DFSP que condicionan un crecimiento más infiltrativo, asimétrico e impredecible, lo que supone mayor morbilidad para el paciente y una mayor dificultad para su tratamiento. Objetivos: 1.-Realizar un análisis observacional y descriptivo de una serie de casos de DFSP que han sido vistos en el Servicio de Dermatología del IVO, según las características epidemio…

Double localization and multiple recurrences of dermatofibrosarcoma protuberans of the female breast: a rare clinical case.

2015

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