NAACCR Item #3891: Microvascular Density

Start Column

1885

End Column

1886

Alignment

LEFT

Padding Character

' '

Documentation

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired Column #
3891 2 NAACCR 2018 18 1885 - 1886

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
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.