inflammatory myofibroblastic tumor


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  • Histology

    • inflammatory cells
      • Touton giant cells
      • histiocytes
    • spindle cells
      • fascicles, whirls
      • fibroblastic
      • myofibroblastic

  • Stains

    • spindle cells
      • positive for vimentin, SMA
      • can have focal CK
      • lack myogenin, myoglobin, cKit, S100
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