1. Age \> 18 years old. Both male and female are eligible.
2. Late stage metastatic colorectal adenocarcinoma diagnosed by histology or cytology.
3. With potential opportunity of achieving NED status (including liver metastasis, lung metastasis, solitary lymph node metastasis, ovarian metastasis or focal pelvic metastasis), regardless of neo-adjuvant therapy or transforming therapy.
4. Patients who are intended for focal therapy, radical surgery, focal radiotherapy, radiofrequency ablation or interventional therapy (anhydrous alcohol injection or cryotherapy)
5. Eastern Cooperative Oncology Group (ECOG) grade 1-2.
6. Approve the informed consent.
7. Available for tumor sample obtained by resection or aspiration.
8. Available for peripheral blood collection (10mL per tube for 2 tubes)
You may not be if
1. Cannot get histologic or cytologic diagnosis.
2. Clinical tumor, node, and metastasis (cTNM) stage I-III according to the American Joint Committee on Cancer (AJCC), the 8th edition.
3. Accompany with widespread metastasis and cannot achieve NED status by focal therapy, such as bone metastasis, peritoneum metastasis, diffuse liver or lung metastasis or malignant effusion, etc.
4. Inadequate bone marrow reserve and organ function.
5. Uncontrolled or severe systemic diseases, such as uncontrolled hyperplasia, severe infection, hepatitic B virus (HBV) infection, hepatitis C virus (HCV) infection, human immunodeficiency virus (HIV) infection, etc.
6. History of alcohol or drug abuse.
7. Pregnant or lactating women.
8. Cannot get tumor sample.
Clareo Health | Predictive Value of ctDNA for NED Status in mCRC and Its Utility in Guiding Therapeutic Intervention
