Conclusion : contrast - enhanced ultrasound demonstrates typical hemangioma imaging characteristics , that is , peripheral nodular contrast enhancement and iris - diaphragm sign in a high percentage of patients with undetermined lesions 结论：超声造影表现为典型的肝血管瘤影像学特点，即在绝大部分有不确定病变的病人中表现为周围结节性增强和可变光圈征。
In patients with a solitary , rapidly growing , sometimes painful , well - defined , isoechoic to hypoechoic nodule with increased ascularity in the upper extremity , the possibility of nodular fasciitis should be considered in the differential diagnosis 如果病人上肢出现单发的、生长迅速、有时出现疼痛、边界清晰、等回声到低回声、血流增多的结节，在鉴别诊断时应该考虑到结节性筋膜炎的可能。
