The effectiveness of cancer treatment is evaluated using a combination of methods:
1. Imaging: Regular scans to monitor changes in the size and location of the tumor. 2. Biomarkers: Changes in levels of specific biomarkers can indicate how well the treatment is working. 3. Symptom Tracking: Monitoring the patient's symptoms to see if they are improving or worsening. 4. Follow-up Biopsies: Sometimes additional tissue samples are necessary to assess the impact of treatment on the cancer cells.