Tumor Growth Pattern


**Note 1:** Physician statement of tumor growth pattern can be used to code this data item when no other information is available. **Note 2:** 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 3:** Record the presence or absence of an infiltrating periductal component. This information may be obtained from radiology, surgery, or pathology reports.




NAACCR #3935


Code Description
1 Mass-forming
2 Periductal infiltrating
3 Mixed mass-forming and periductal infiltrating
8 Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 8 may result in an edit error.)
9 Not documented in medical record Pathology report does not mention tumor growth pattern Cannot be determined by the pathologist Tumor growth pattern not assessed or unknown if assessed