Biorepository Inventories
Sample Types and Inventory Summary
The CIBMTR Biorepository contains approximately 3 million sample aliquots from more than 60,000 first allogeneic related and unrelated transplant recipient/donor (or cord blood) pairs with complete, validated clinical outcome data from CIBMTR's Research Database. The majority of the paired samples have complete high-resolution data available for HLA-A, B, C, DRB1/3/4/5, DQ and DP loci.
Sample Types
Samples in the CIBMTR Biorepository are stored as:
- Whole blood
- Cryopreserved whole blood
- Plasma
- Blood spotted on filter paper
- Peripheral blood mononuclear cells (PBMC) viable and non-viable
- B-Lymphoblastoid cell lines (B-LCL) viable and non-viable
- Granulocytes
- Serum
- DNA
- Whole genome amplified DNA
Available sample types vary by sample source and year of collection. Sample sources include: Adult and pediatric related/unrelated donors, cord blood and transplant recipients. Samples from recipients are drawn before the patient’s conditioning regimen begins. Prior to January 1, 2000, 100-day post-transplant samples were also drawn.
| CIBMTR Biorepository as of November 2025 | |
|---|---|
| Number of unrelated Donor/Recipient pairs | 52,147 |
| Number of unrelated Cord blood/Recipient pairs* | 6,535 |
| Number of unique unrelated Donor ID | 95,017 |
| Number of unique unrelated Recipient ID | 96,132 |
| Number of unique Cord ID | 14,582 |
| Number of unique related Donor ID | 16,770 |
| Number of unique related Recipient ID | 17,503 |
| Number of related Donor/Recipient Pairs | 14,529 |
*Pair counts include incomplete multi-cord pairs with recipient and at least one cord sample available.
View a detailed summary of the available recipient and/or donor samples from first transplants, which includes information about the sample inventory by variable, including: age, gender, high-resolution typing, disease status, graft type, conditioning regimen, GVHD prophylaxis, and more: CIBMTR Biorepository Sample Inventory (PDF).
More information
For information about the availability of sample types or specific inventory queries, contact research-repos@nmdp.org.