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A, Microdissected clear cell chondrosarcoma area used for next‐generation sequencing (NGS). B, NGS showing the presence of the IDH1 c.395G>T, p.Arg132Leu mutation (allele frequency: 0.03). C, Microdissected conventional chondrosarcoma area used for NGS. D, NGS showing the presence of an identical IDH1 c.395G>T, p.Arg132Leu mutation (allele frequency: 0.29) (case 1). Scale bar: 250 μm (A,C).
