Slightly enlarged lymph nodes in the abdominal cavity and retroperitoneum are diagnosed by imaging, usually seen in examinations such as abdominal CT or MRI, and are commonly caused by the following reasons: reactive hyperplasia of the lymph nodes, lymphoma, metastasis of the lymph nodes, and so on.
1. Reactive hyperplasia of lymph nodes: If an infection occurs in the abdominal cavity, etc., it may lead to reactive hyperplasia of lymph nodes, and the lymph nodes in the abdominal cavity and retroperitoneum may increase in size.
2. Lymphoma: It is a malignant tumor of the blood system, and enlarged lymph nodes may appear in many parts of the body, and the abdominal cavity and retroperitoneum may also have enlarged lymph nodes.
3. Lymph node metastasis: if malignant tumor occurs, the tumor may be transferred to the lymph nodes in the abdominal cavity and retroperitoneum, which is called lymph node metastasis and manifested as enlarged lymph nodes.
It is suggested that patients should consult the doctor in time, and need to improve relevant examinations, including tumor markers, blood routine, etc., which can usually clarify the cause of the disease.