Malignant neoplasm metastasis in inguinal lymph nodes is caused by the spread of cancer cells from a primary tumor to the lymph nodes in the inguinal region. This can occur as a result of direct invasion from the primary tumor, or through the lymphatic system.
The diagnosis of malignant neoplasm metastasis to inguinal lymph nodes is usually confirmed by a combination of imaging studies, biopsy results, and laboratory tests. Imaging studies such as computed tomography (CT) scans, magnetic resonance imaging (MRI), and positron emission tomography (PET) scans may be used to detect the presence of metastases in the lymph nodes. A biopsy may also be performed to confirm the presence of cancer cells in the lymph nodes. The laboratory tests may include a complete blood count, a chemistry panel, and tumor markers.
The differential diagnosis of malignant neoplasm metastasis to inguinal lymph nodes includes other causes of enlarged lymph nodes such as infection, inflammatory conditions, and benign neoplasms.
Treatment for malignant neoplasm metastasis to inguinal lymph nodes is usually based on the type of primary tumor and the stage of the metastatic disease. Treatment may include surgery to remove the affected lymph nodes, radiation therapy, chemotherapy, or a combination of these.
The prognosis for patients with malignant neoplasm metastasis to inguinal lymph nodes depends on the type of primary tumor, the stage of the metastatic disease, and the response to treatment. If the primary tumor is localized and the metastatic disease is localized, the prognosis is generally good. However, if the metastatic disease is advanced or if the primary tumor is aggressive, the prognosis is poor.