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4 楼 发表于2009-03-31 09:36:00举报|引用
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Low grade spindle cell tumor. I favor fibrosarcoma. Neuronal tumor is also in the differential. Need to count mitotic figures for a solid diagnosis. I think we need >4mitotic figures/10 high power field for fibrosarcoma. Photo 2: areas of necrosis or chondoid differentiation? Cannot tell from this power. Other low power fields show herringbone and patternless pattern. I don't see epithelial nests for synovial sarcoma.
Low grade spindle cell tumor. I favor fibrosarcoma. Neuronal tumor is also in the differential. Need to count mitotic figures for a solid diagnosis. I think we need >4mitotic figures/10 high power field for fibrosarcoma. Photo 2: areas of necrosis or chondoid differentiation? Cannot tell from this power. Other low power fields show herringbone and patternless pattern. I don't see epithelial nests for synovial sarcoma.
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