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Ultrastructural evidence of myofibroblasts in pseudomalignant myositis ossificans

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Summary

Seven cases of pseudomalignant ossifying myositis with a typical clinical symptomatology have been reported. None of the cases had experienced an injury. All the lesions were intramuscular and all of them showed a zonal arrangement. Electron microscopy in three cases allowed the demonstration of cells showing morphological features of myofibroblasts and monocytic cells of the macrophage type. These previously unreported features together with the zonal pattern of the lesions indicate their reparative nature.

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Povysil, C., Matějovský, Z. Ultrastructural evidence of myofibroblasts in pseudomalignant myositis ossificans. Virchows Arch. A Path. Anat. and Histol. 381, 189–203 (1979). https://doi.org/10.1007/BF01257884

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