NAACCR Item #3891: Microvascular Density
| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 3891 | 2 | NAACCR | 2018 | 18 |
NAACCR XML:
Tumor.microvascularDensity
Description
Microvascular Density (MVD), a quantitative measure of tumor vascularity, is a prognostic factor for uveal melanoma.
Rationale
Microvascular Density (MVD), is a Registry Data Collection Variable in AJCC. This data item was previously collected as Uveal Melanoma, CS SSF# 13.
Codes
| 00 | No vessels involved |
| 01-99 | 01-99 vessels per 0.3 square millimeter (mm2) |
| X1 | Greater than or equal to 100 vessels per 0.3 square millimeter (mm2) |
| X2 | Lowest quartile for laboratory |
| X3 | Second quartile for laboratory |
| X4 | Third quartile for laboratory |
| X5 | Highest quartile for laboratory |
| X7 | Test ordered, results not in chart |
| X8 | 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.) |
| X9 | Not documented in medical record Microvascular Density (MVD) not assessed or unknown if assessed |
Code Notes
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.