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guidebook. - Fanconi Anemia Research Fund

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Chapter 10: Unrelated Donor HSCT<br />

207<br />

Figure 1: Donor Search Process<br />

Patient’s HLA Typing<br />

High Resolution at<br />

HLA-A, B, C, and DRB1<br />

Extended Family<br />

Member Typing High<br />

Resolution at HLA-A, B,<br />

C, DRB1<br />

Adult Volunteer<br />

Donors<br />

Search of Unrelated<br />

Donor Registries<br />

Umbilical<br />

Cord Banks<br />

7-8/8 HLA<br />

Matched<br />

Donor<br />

Identified<br />

#1 Choice<br />

8/8 HLA<br />

Matched<br />

Donor<br />

Identified<br />

#2 Choice<br />

7/8 HLA<br />

Matched<br />

Donor<br />

Identified<br />

or<br />

HLA 6/6 or<br />

5/6 Umbilical<br />

Cord Blood<br />

Unit Identified<br />

with Adequate<br />

Cell Dose*<br />

HLA 4/6<br />

Umbilical Cord<br />

Blood Unit<br />

with Adequate<br />

Cell Dose*<br />

#4 Choice<br />

*See Donor Selection<br />

(Table 5)<br />

#3 Choice<br />

HLA-matched unrelated donor. Based on the general<br />

experience with non-FA patients, donor priority<br />

accepted by major FA transplant centers is shown in<br />

Table 5.<br />

In some circumstances, greater degrees of HLA disparity<br />

might be considered acceptable. In the context of a<br />

transplant center phase I–II trial, related marrow donors<br />

mismatched at 2 or 3 antigens and unrelated umbilical<br />

cord blood donors mismatched at 3 antigens might<br />

also be used as a source of hematopoietic stem cells for<br />

transplantation.<br />

Because of proven effect on transplant outcome, other<br />

factors are considered in the selection of an alternate<br />

donor, such as age of donor, CMV serostatus, female<br />

parity (i.e., number of pregnancies), and sex match

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