结节性筋膜炎 (nodularfasciitis,NF)又称为假肉瘤性筋膜炎 ,是一种以纤维母细胞和肌纤维母细胞增生为主的软组织瘤样病变。由于病变生长迅速 ,增生的纤维母细胞生长活跃 ,核分裂相多见 ,组织学图像多变 ,极易误诊为肉瘤。本病 90 %位于皮下和深筋膜 ,常见部位依次为上肢、头颈 Nodular fasciitis (NF), also known as pseudosarcoma fasciitis, is a soft tissue tumor-like lesion predominantly characterized by fibroblasts and myofibroblasts. Due to the rapid growth of the lesion, hyperplastic fibroblasts grow actively, the mitotic phase is common, and the histological images are changeable, which can be easily misdiagnosed as sarcoma. 90% of the disease is located in the subcutaneous and deep fascia, followed by the common parts of the upper limbs, head and neck