Diseases that may be suggested by abnormal ultrasound of axillary lymph nodes include nonspecific lymphadenitis, lymphadenitis, lymph node tuberculosis, lymphoma, and lymph node metastasis of malignant tumors. 1. Non-specific lymphadenitis: also known as reactive hyperplasia of lymph nodes, ultrasound shows that the enlarged lymph nodes are round, with smooth and neat borders and homogeneous hypoechoic areas. The cortex of the lymph node is thickened, the medulla is reduced, and the blood flow signal in the lymph node portal is increased. 2. Lymph node tuberculosis: in the early stage of the disease, the lymph nodes are congested, edematous, and increase in volume, and the sonogram only shows relatively homogeneous hypoechoic. In the stage of caseous necrosis, the internal echoes of the lymph nodes are disorganized, with hypoechoic and anechoic echoes, accompanied by strong echoes like light spots and light clusters. 3. Lymphoma: ultrasonography shows that the lymph nodes are enlarged in size, and the morphology is round and round-like, the normal corticomedullary structure disappears, and it can present uniform or uneven echoes, and the blood vessels are tortuous, and it can be found that the lymph nodes are hard, and there are hepatomegaly and splenomegaly at the same time. 4. Lymph node metastasis of malignant tumors: the lymph nodes in the axilla are enlarged for unknown reasons, and most of the foci are originated from breast and lungs when the pathology suggests that they are metastatic cancer. This kind of lymph node is often manifested as a fused strongly echogenic mass with abnormal distribution of blood vessels inside the mass, accompanied by calcification formation and indistinct corticomedullary boundary. If the results of the examination show abnormal ultrasound of axillary lymph nodes, the patient should not judge or diagnose on the basis of a single examination result, but should consult the doctor in time, and if necessary, carry out a biopsy of the lymph nodes to further clarify the diagnosis.