NAACCR Item #3834: Extravascular Matrix Patterns

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
3,834 1 NAACCR 2018 18

NAACCR XML: Tumor.extravascularMatrixPatterns


Extravascular Matrix Patterns, the presence of loops and networks in extracellular matrix patterns, is a prognostic factor for uveal melanoma.


Extravascular Matrix Pattern is a Registry Data Collection Variable in AJCC 8. This data item was previously collected as Uveal Melanoma, CS SSF #11 and CS SSF# 12. These two data items were combined and simplified into one data for cases diagnosed 1/1/2018+.


0Extravascular matrix pattern not present/not identified
1Extravascular matrix pattern present/identified
8Not 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.)
9Not documented in medical record Extravascular Matrix Pattern 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.