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Retroperitoneum – MyoD1 negative malignant peripheral nerve sheath tumor (MPNST). |
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Retroperitoneum – Strong MyoD1 positivity of most tumor cells of a sarcoma NOS. |
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Skeletal muscle – Moderate to strong MyoD1 immunostaining of all cells in a rhabdomyosarcoma. |
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Skeletal muscle – Moderate MyoD1 immunostaining of all cells in a rhabdomyosarcoma. |
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