Site-Specific Factor 10

Tumor Growth Pattern


**Note 1:** Cholangiocarcinoma may be classified by growth pattern. The tumor growth patterns of intrahepatic cholangiocarcinoma include the mass forming type, the periductal infiltrating type, and a mixed type. The periductal infiltrating type of cholangiocarcinoma demonstrates a diffuse longitudinal growth pattern along the bile duct. Limited analyses suggest that the diffuse periductal infiltrating type is associated with a poor prognosis. **Note 2:** Record the presence or absence of an infiltrating periductal component. This information may be obtained from radiology, surgery, or pathology reports. **Note 3:** Only code absence of periductal component if a physician states that periductal component is not present or if the tumor is described as mass-forming only. * If diagnostic and/or treatment records are not available, record 999 for unknown




NAACCR #2864
Code Description
000 Absence of periductal component
010 Presence of periductal component
988 Not applicable: Information not collected for this case
999 Unknown or no information
Not documented in patient record