Metastatic adenocarcinoma refers to cancer that has spread from its original (primary) site to other parts of the body. The term adenocarcinoma specifically refers to a type of cancer made up of glandular cells, which are the cells found inside most internal organs. For example, if someone has metastatic adenocarcinoma of the breast, it means that cancer cells from the original breast tumor have spread to other organs or tissues in the body.
Cancer cells can break away from the primary tumor and travel through the bloodstream or lymphatic system to distant organs or tissues, where they can form new tumors. The new tumors are called metastases. Pathologists use the terms lymphovascular invasion and angiolymphatic invasion to describe cancer cells inside of a blood vessel or lymphatic space.
Identifying the primary tumor in cases of metastatic adenocarcinoma can be challenging, but pathologists use a combination of techniques and tests to determine the origin of the cancer.
Here are some common methods:
Despite these methods, determining the primary tumor site may not always be straightforward, especially in cases where metastasis is the first manifestation of cancer. In some instances, the primary tumor remains unidentified, and the cancer is classified as a “cancer of unknown primary” (CUP).
The prognosis and treatment options for metastatic adenocarcinoma depend on various factors, including the specific type of adenocarcinoma, the organs involved, and the individual’s overall health. Treatment may involve a combination of surgery, chemotherapy, radiation therapy, targeted therapy, immunotherapy, or other approaches, depending on the characteristics of the cancer and its extent of spread.
Doctors wrote this article to assist you in reading and comprehending your pathology report. Feel free to reach out to us with any questions about this article or your pathology report. To get a comprehensive introduction to your pathology report, read this article.