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Figure 2: Microscopic appearances of the primary tumor. (a) The cells composing most of the tumor are characterized by a cellular proliferation of spindle cells forming long fascicles and often arranged in a herringbone growth pattern (×200). (b) Epithelioid cells showed nested pattern and cytoplasm is abundant and eosinophilic (×200). (c) A transitional region between the epithelioid and spindle sarcomatous components was seen (×400). (d) The main clue for the diagnosis- of rhabdomyosarcoma is the identifi cation of rhabdomyoblasts, which may be spindled/elongated or polygonal (×400)

Figure 2: Microscopic appearances of the primary tumor. (a) The cells composing most of the tumor are characterized by a cellular proliferation of spindle cells forming long fascicles and often arranged in a herringbone growth pattern (×200). (b) Epithelioid cells showed nested pattern and cytoplasm is abundant and eosinophilic (×200). (c) A transitional region between the epithelioid and spindle sarcomatous components was seen (×400). (d) The main clue for the diagnosis- of rhabdomyosarcoma is the identifi cation of rhabdomyoblasts, which may be spindled/elongated or polygonal (×400)