Data Last Updated: Oct. 15, 2024

Extravascular Matrix Patterns

Description

Extravascular Matrix Patterns, the presence of loops and networks in extracellular matrix patterns, is a prognostic factor for uveal melanoma. The presence of extravascular matrix patterns is an indicator for shorter survival. There are two different types of patterns: loops only, or loops forming networks. The identification of the complex monocirculatory patterns (i.e., loops, networks, arcs with branching, parallel with cross-linking or a combination of these patterns) are done using confocal indocyanine green angiography. The patterns are assessed with light microscopy under a dark green filter after staining with periodic-acid Schiff without counterstain. This determines the presence or absence of each matrix pattern, which appear deep purple against a pink background.

Notes

**Note:** **Physician Statement** * Physician statement of extravascular matrix patterns can be used to code this data item when no other information is available.
Code Description
0 Extravascular matrix patterns not present/not identified
1 Extravascular matrix patterns present/identified
8 Not 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.)
9 Not documented in medical record
Extravascular Matrix Patterns not assessed or unknown if assessed