STWS Home STWS Home
 Coding CS Tumor Size   Print Search Glossary Help

This field records the largest dimension, or the diameter of the primary tumor, and is always recorded in millimeters. To convert centimeters to millimeters, multiply the dimension by 10.

The table below shows the allowable values for the 3-digit Tumor Size field in Collaborative Staging, using colon as an example.

Code Description
000

Indicates no mass or no tumor found.

001-998
Exact size in millimeters.
989
989 millimeters or larger.
990
Microscopic focus or foci only; no size of focus is given.
991
Described as less than 1 cm.
992
Described as less than 2 cm.
993
Described as less than 3 cm.
994
Described as less than 4 cm.
995 Described as less than 5 cm.
  Site Specific Codes Where Needed
998 Familial polyposis (M8220/8221)
999 Unknown; size not stated; not stated in patient record.

Click here to see General Rules for Coding Tumor Size.

Go to top