| parent | Clusters of differentiation | LP32944-8 |
| child | Blasts.CD21 | LP65923-2 |
| child | CD21 cells | Blood | Cell markers | LP399578-6 |
| child | CD21 Ag | LP57333-4 |
| child | Cells.CD21/100 cells | LP285368-9 |
| child | Cells.CD21/100 Cells.CD19 | LP285369-7 |
| PartDisplayName | en-US | Cells.CD21 |
| DisplayName | en-US | CD21 cells |
LOINC Version: 2.77
FHIR