BileDuctsIntraHepat

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.
Note 4: All tumors with a periductal infiltrating growth pattern are considered T4 by AJCC. For tumors with periductal infiltrating growth pattern, code the most specific information available about the extent of the tumor in CS Extension, and code periductal infiltrating growth pattern here. The algorithm will adjust the T category for tumors with periductal growth pattern.

Code	Description
000	Absence of periductal component
010	Presence of periductal component
988	Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 988 may result in an edit error.)
999	Unknown or no information Not documented in patient record

CS Site-Specific Factor 10Tumor Growth Pattern