NAACCR Item #3887: Measured Basal Diameter

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
3,887 4 NAACCR 2018 18

NAACCR XML: Tumor.measuredBasalDiameter


Measured Basal Diameter, the largest basal diameter of a uveal melanoma, is a prognostic indicator for this tumor.


Measured Basal Diameter is listed as a Registry Data Collection Variable in AJCC. It was previously collected as Uveal Melanoma, CS SSF# 2.


0.0No mass/tumor found
0.1-99.90.1-99.9 millimeters (mm) (Exact measurement to nearest tenth of mm)
XX.0100 millimeters (mm) or larger
XX.1Described as "less than 3 mm"
XX.2Described as "at least" 3 mm
XX.3Described as "at least" 6 mm
XX.4Described as "at least" 9 mm
XX.5Described as "at least" 12 mm
XX.6Described as "at least" 15 mm
XX.8Not 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.9Not documented in medical record Cannot be determined by pathologist Measured Basal Diameter not assessed or unknown if assessed

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.