软组织多形性透明变性血管扩张性肿瘤(pleomorphichyalinizing angiectatic tumor of soft parts,PHAT)是一种发生于软组织内瘤细胞分化方向未定的非转移性肿瘤,由Smith等[1]于1996年首先描述,其组织学特征正如其命名,即肿瘤 Soft tissue pleomorphic immunosuppressive tumor of soft parts (PHAT) is a non-metastatic tumor that has undetermined tumor cell differentiation in soft tissue. It was first described by Smith et al [1] in 1996, Its histological features, as its name, is the tumor