Soft tissue density shadow to do tissue biopsy to further confirm the diagnosis of benign and malignant. The change of soft tissue density shadow is mainly examined on MRI, through the change of the imaging signal shadow of the subcutaneous tissue layer, muscle layer and other lesions of soft tissues, such as malignant tumors nuclear magnetic manifestation of unclear boundaries, lack of envelope, invasion of surrounding tissues, rich blood supply and other characteristics, combined with the scanning and enhancement of the imaging situation for the initial characterization. However, it is impossible to determine its benign or malignant nature. For those with significant changes in soft tissue density shadow, more often than not, surgical resection and intraoperative freezing of the diseased tissue for rapid examination can be used to understand the nature of the tumor, followed by immunohistochemistry based on the pathological results to ultimately determine the degree of its benign and malignant. For malignant soft tissue tumors, further treatment such as radiotherapy is required. The presence of soft tissue density shadows requires active medical consultation and rational treatment as prescribed by the doctor.