Diagnostic samples (taken according to UK guidelines, below) should be sent via the usual routes and take precedence over samples for CellBank.
UK guidelines for sampling
The principle behind these guidelines is that all essential diagnostic samples are taken from the first pass of the bone marrow needle, a second needle pass into the bone is then made through the same skin incision at a different angle. This is to avoid sending ever more dilute samples for MRD and banking.
Acute lymphoblastic leukaemia (ALL)
First pass (sample requirements as per local practice)
- Morphology
- Flow cytometry
- Cytogenetics
Second pass (in order of priority)
- MRD - 5ml ACD
- CellBank - 5ml ACD
- Local studies (if applicable)
Acute myeloid leukaemia (AML)
First pass (sample requirements as per local practice)
- Morphology
- Flow cytometry
- Cytogenetics/ molecular markers
Second pass (in order of priority)
- CellBank - 5ml ACD
- Local studies (if applicable)