What does an elevated carcinoembryonic antigen (CEA) level after colorectal cancer treatment indicate?

An elevated carcinoembryonic antigen (CEA) level following colorectal cancer treatment is significant because it typically indicates potential disease recurrence or progression. CEA is a tumor marker that can be monitored over time, and rising levels after surgical treatment can suggest that the cancer has not been completely eradicated or may have returned. This information is crucial for guiding further treatment decisions, such as the need for additional imaging studies, chemotherapy, or other therapeutic interventions. Monitoring CEA levels helps oncologists assess the effectiveness of treatment plans and make informed decisions for patient management moving forward, thereby confirming that the provided answer accurately reflects the clinical utility of CEA in the context of colorectal cancer monitoring.