NAACCR Item #3891: Microvascular Density

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
3,891 2 NAACCR 2018 18

NAACCR XML: Tumor.microvascularDensity


Microvascular Density (MVD), a quantitative measure of tumor vascularity, is a prognostic factor for uveal melanoma.


Microvascular Density (MVD), is a Registry Data Collection Variable in AJCC. This data item was previously collected as Uveal Melanoma, CS SSF# 13.


00No vessels involved
01-9901-99 vessels per 0.3 square millimeter (mm2)
X1Greater than or equal to 100 vessels per 0.3 square millimeter (mm2)
X2Lowest quartile for laboratory
X3Second quartile for laboratory
X4Third quartile for laboratory
X5Highest quartile for laboratory
X7Test ordered, results not in chart
X8Not 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.)
X9Not documented in medical record Microvascular Density (MVD) 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.