Tumorabsiedlungen

Tumorabsiedlungen, also known as metastases, represent the spread of cancer cells from their original site, the primary tumor, to other parts of the body. This process, termed metastasis, is a hallmark of malignant tumors and is a major cause of cancer-related mortality. It typically occurs in stages. First, cancer cells invade surrounding tissues, then they enter the bloodstream or lymphatic system. Once in circulation, these cells can travel to distant organs, where they may establish new tumors, known as secondary tumors or metastases. Common sites for metastasis include the lungs, liver, bones, and brain, although the specific pattern of spread depends on the type of primary cancer. Symptoms of metastases vary greatly depending on the location and size of the secondary tumors. For example, bone metastases can cause pain and fractures, while lung metastases may lead to coughing and shortness of breath. Diagnosis often involves imaging techniques such as CT scans, MRI, or PET scans, alongside biopsies of suspicious lesions. Treatment strategies for metastases are tailored to the primary cancer, the extent of spread, and the patient's overall health. They may include surgery, radiation therapy, chemotherapy, targeted therapy, or immunotherapy. The goal of treatment is often to control tumor growth, alleviate symptoms, and improve quality of life.