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

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.
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
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.