dermatofibrosarcoma/peroxidase

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An immunohistochemical study of dermatofibrosarcoma protuberans supports its fibroblastic character and contradicts neuroectodermal or histiocytic components.

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Paraffin-embedded material from 26 cases of dermatofibrosarcoma protuberans (DFSP) was investigated by the peroxidase-antiperoxidase technique. Antibodies to S-100 protein, Leu-7 antigen, and neuron-specific enolase (neural markers); to lysozyme, alpha-1-antitrypsin, and alpha-1-antichymotrypsin

[Immunohistochemical studies of the histogenesis of dermatofibrosarcoma protuberans].

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Paraffin-embedded tissue sections taken from 16 patients with dermatofibrosarcoma protuberans were stained by means of the peroxidase-antiperoxidase technique using antibodies against S 100 protein, NSE, Leu 7, lysozyme, alpha-1 antitrypsin, alpha-1 antichymotrypsin, cytokeratin, desmin, vimentin,

Dermatofibrosarcoma protuberans treated with Mohs surgery. A case with CD34 immunostaining variability.

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BACKGROUND Immunohistochemical stains for CD34 antigen can help in differentiating dermatofibrosarcoma protuberans (DFSP) from other fibrohistiocytic tumors and in demarcating its surgical margins during Mohs surgery. However, variable expression of CD34 antigen in nodular areas can sometimes result

Prekeratin in spindle cell tumors of the skin.

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A variety of benign and malignant skin lesions was stained for the presence of prekeratin using an unlabeled antibody peroxidase-antiperoxidase method and an antibody raised against human prekeratin protein. No prekeratin could be detected in benign or malignant lesions derived from melanocytes, and

Neural cell adhesion molecule distribution in soft tissue tumors.

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The distribution of the neural cell adhesion molecule (N-CAM; CD56) was studied immunohistochemically in acetone-fixed frozen sections of 83 soft tissue tumors and selected normal mesenchymal tissue using Leu-19 monoclonal antibody and avidin-biotin peroxidase immunostaining. Positive N-CAM

p53/MDM-2 immunohistochemical expression correlated with proliferative activity in different subtypes of human sarcomas: a ten-year follow-up study.

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The aim of this study was the evaluation of p53/MDM-2 protein overexpression in different subtypes of human sarcomas, and their correlation with proliferative activity and patient outcome. We selected 40 cases of human sarcomas comprising 6 malignant fibrous histiocytomas (MFH), 1 fibrosarcoma, 1

Immunohistochemical identification of lysozyme in cutaneous lesions of alleged histiocytic nature.

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Histiocytosis X, multicentric reticulohistiocytosis, juvenile xanthogranuloma, the "fibrous" type of dermatofibroma, dermatofibrosarcoma protuberans, and malignant fibrous histiocytoma are all characterized by dermal and/or subcutaneous infiltrates composed at least partially of cells having

Immunohistochemical characterization of Ki-M6 monoclonal antibody in Bouin-fixed, paraffin-embedded sections of normal and neoplastic human tissues.

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A monoclonal antibody (Ki-M6) against the CD 68 antigen, which labels cells of the monocyte/macrophage system, was tested on Bouin-fixed, paraffin-embedded samples of normal, reactive and neoplastic tissues by an avidin-biotin-peroxidase complex method, with the aim of establishing its value in

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