Microvascular Density (MVD)
Notes
**Note 1:** Physician statement of microvascular density (MVD) can be used to code this data item when no other information is available.
**Note 2:** MVD is independently associated with metastatic risk. The number of immunopositive elements is labeled with a marker for vascular endothelial cells (e.g., CD34 epitope, CD31 epitope, factor VIII-related antigen) and counted from area of densest vascularization (typical field area, 0.3 mm2 squared). Higher counts are associated with shorter survival.
**Note 3:** Record the results as expressed on the laboratory test. Record the information based on quartiles for laboratory standards if this is the only expression of results.
Default
X8
Metadata
SSDI
| Code |
Description |
| 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 |
