Lợi nhuận Mô tả tổn thương Echogenicity Lateral / Anteroposterior kích thước nội bộ vang mô hình Retrotumoral âm thanh mô hình cạnh bóng tối nén có hiệu lực Tác dụng trên cấu trúc thứ cấp tính năng ác tính Hầu như anechoic, giảm âm không rõ ràng lởm chởm (microlobulations) nhỏ hơn không đồng nhất mạnh | Breast Ultrasound 139 Table 1. Guidelines for classifying lesions Lesion Description Malignant Features Benign Features Echogenicity Almost anechoic hypoechoic Anechoic hyperechoic Margins Indistinct jagged microlobulations Indistinct smooth sharp jagged sharp and smooth Lateral Anteroposterior dimension Less than one Greater than one Internal echo pattern Non homogeneous Homogeneous or no echoes Retrotumoral acoustic pattern Strong moderate or slight shadowing Posterior enhancement Edge shadows Lateral only Bilateral Compression effect No change in shape or internal echoes Changes in shape compresses or becomes more homogeneous Effects on secondary structures Invades or disrupts secondary structures No disruption Compression effect on shape and internal echoes The lesion is compressed and changes in shape and internal echoes are described. Lesions either demonstrate no change change in shape or echoes become more homogeneous. Effects on secondary structures Structures such as the ducts and glandular tissue may be compressed or interrupted in the presence of a lesion or no change demonstrated at all. For simplicity lesions are categorized as benign indeterminate and suspicious. Benign lesions are observed unless the patient is symptomatic or she he requests biopsy. Suspicious lesions require core biopsy with confirmatory results. If a lesion is suspicious and nonconcordant results are obtained discrete mass on ultrasound but pathology reveals nonspecific findings there should be strong consideration for an excisional biopsy. Indeterminate lesions require either aspiration to document a cystic structure or core biopsy. In summary Table 1 describes guidelines for classifying lesions. While each column contains characteristic features none of the descriptions below exclude categorization in the opposite column. According to Stavoros et al 9 if a lesion has any one malignant feature a biopsy is required. Only three combinations of benign features allow categorization .
