Rhabdomyosarcoma Subtyping by Immunohistochemical Assessment of Myogenin: Tissue Array Study and Review of the Literature |
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Authors: | D. A. Morgenstern H. Rees N. J. Sebire J. Shipley John Anderson |
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Affiliation: | (1) Unit of Molecular Haematology and Cancer Biology, Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, UK;(2) Department of Histopathology, Great Ormond Street Hospital for Children, London, UK;(3) Department of Molecular Cytogenetics, Intsitute of Cancer Research, Sutton, Surrey, UK |
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Abstract: | Myogenin immunostaining has been described as a useful marker of the alveolar subtype of rhabdomyosarcoma and as a tool for distinguishing it from the more common embryonal subtype. To add to the growing body of literature describing this phenomenon we analysed myogenin immunohistochemical staining in 152 tumors using a rhabdomyosarcoma tissue array. Results were analysed blinded to histological type by two independent investigators. Samples were excluded if any samples failed to stain with desmin and/or myogenin. Mean percentage of myogenin positive cells was significantly greater for ARMS (n = 31; mean percentage positivity 59% (95% confidence intervals ± 7%) than ERMS (n = 41, mean percentage positivity 16%, 95% confidence intervals ± 4; P < 0.0001). This data is consistent with previously published studies identifying strong nuclear myogenin staining in a high proportion of cells as a marker of alveolar histology. |
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Keywords: | Rhabdomyosarcoma Myogenin Tissue array Diagnosis |
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