Rhabdomyosarcomatous Transformation of a Gastrointestinal Stromal Tumor following Treatment with Imatinib

Figure 2

Tumor at the time of en bloc resection. Left panels showing H&E (a, b) and immunophenotype of spindle cell component (a, c, e, g, and i) and right panels showing rhabdomyosarcomatous component (b, d, f, h, and j) as follows: (c, d) c-kit IHC, 200x, (e, f) DOG1 IHC, 200x, (g, h) desmin IHC, 200x, and (i, j) myoD-1, 400x.

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