Interestingly, the ESN showed focal peripheral ossification, a rare feature of ESN and/or LG‐ESS but a hallmark of ossifying fibromyxoid tumors with which they may share also other molecular events such as PHF1 fusions, that is, EP400/PHF1, MEAF6/PHF1, and EPC1/PHF1. This evidence concerns the gene PHF1 and fibromyxoid tumor.