Measured Basal Diameter


**Note 1:** Physician statement of measured basal diameter (not the same as tumor size) can be used to code this data item when no other information is available. **Note 2:** Code Measured Basal Diameter of tumor not size. Record actual measurement in millimeters (mm) to nearest tenth from clinical documentation, or from a pathology report if surgery performed.




NAACCR #3887


Code Description
0.0 No mass/tumor found
0.1-99.9 0.1 – 99.9 millimeters (mm) (Exact measurement to nearest tenth of mm)
XX.0 100 millimeters (mm) or larger
XX.1 Described as "less than 3 mm"
XX.2 Described as “at least” 3 mm
XX.3 Described as “at least” 6 mm
XX.4 Described as “at least” 9 mm
XX.5 Described as “at least” 12 mm
XX.6 Described as “at least” 15 mm
XX.7 Described as "at least" 18 mm
XX.8 Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code XX.8 may result in an edit error.)
XX.9 Not documented in medical record Cannot be determined by pathologist Measured Basal Diameter not assessed or unknown if assessed