Well-defined hypoechoic echoes are ultrasound descriptions and cannot be used to determine benignity or malignancy. Well-defined hypoechoic echoes are often used to describe benign lesions, but can sometimes be seen in the ultrasound description of malignant lesions, and other information (e.g., blood supply, calcification, etc.) needs to be consulted to help determine the diagnosis. Although other information can help, it is still not conclusive because ultrasound is an imaging test and cannot be used as a qualitative diagnosis. Benign and malignant belong to qualitative diagnosis, need to be determined by pathological examination, that is, to obtain the lesion tissue under the microscope to observe the morphology and characteristics of the cells to make a judgment, pathological examination is the diagnosis of benign and malignant lesions of the “gold standard”. Therefore, a clear hyperechoic border cannot determine the benign or malignant nature of the lesion, more medical information is needed, and the doctor will improve the pathological examination to help confirm the diagnosis if necessary, so it is recommended that the patient under the guidance of the doctor to carry out a detailed assessment and judgment.