The Fong clinical risk score is a tool used to assess the risk of hepatic resection in patients with metastatic colorectal cancer by analyzing five specific medical factors. These factors are evaluated as true or false, and each true condition adds one point to the total score, which ranges from 0 to 5. The factors considered are:

- Node-positive primary
- Disease-free interval less than 12 months from diagnosis of the primary tumor to the appearance of metastasis
- More than one hepatic tumor present
- Preoperative carcinoembryonic antigen (CEA) level greater than 200 ng/mL
- Largest hepatic tumor greater than 5 cm

Each of these factors is assigned a score of 1 if present. By summing up the scores for all factors marked true, a total score is calculated. This total is then used to interpret survival probabilities over 1-year and 5-year timeframes, offering insights into the patient's prognosis and aiding in clinical decision-making.

Here's how the interpretations align with the scores:

| Score | Probability of 1-year survival | Probability of 5-year survival |
|-------|-------------------------------|---------------------------------|
| 0     | 93%                           | 60%                             |
| 1     | 91%                           | 44%                             |
| 2     | 89%                           | 40%                             |
| 3     | 86%                           | 20%                             |
| 4     | 70%                           | 25%                             |
| 5     | 71%                           | 14%                             |

In summary, the score reflects the cumulative impact of these risk factors, directly correlating to survival probabilities, and serves as a valuable tool in planning the treatment strategy for metastatic colorectal cancer., and serves as a valuable tool in planning the treatment strategy for metastatic colorectal cancer.

The Fong Clinical Risk Score is a prognostic tool specifically designed for patients with metastatic colorectal cancer who are undergoing hepatic resection. This scoring system is used to predict the survival outcome after the surgical procedure. It takes into account seven preoperative factors: node-positive primary, disease-free interval from primary to metastases of less than 12 months, more than one hepatic tumor, largest hepatic tumor greater than 5 cm, carcinoembryonic antigen level greater than 200 ng/mL, and presence of extrahepatic disease. Each factor is assigned one point, and the total score ranges from 0 to 5, with higher scores indicating a worse prognosis. The Fong Clinical Risk Score does not have specific exclusion criteria, but it may not be applicable or accurate in patients with other types of cancer or in those who are not candidates for hepatic resection.

Fong clinical risk score for hepatic resection in metastatic colorectal cancer