Figure 1: Numbers of potential unrelated donors registered in the Central Bone Marrow Donors and Cord Blood Registry "Poltransplant" (1.the Regional Blood Transfusion Center in Katowice, 2. the Regional Blood Transfusion Center in Lublin, 3. the Regional Blood Transfusion Center in Poznan, 4. the Regional Blood Transfusion Center in Kielce, 5. the Regional Blood Transfusion Center in Bialystok, 6. the Institute of Hematology and Blood Transfusion in Warsaw, 7. the Military Institute of Medicine in Warsaw, 8. the MEDIGEN Warsaw, 9. the University Clinical Center in Gdansk, 10. the Lower Silesian Oncology Center in Wroclaw, 11. the Ursula Jaworska Foundation in Warsaw, 12. the DKMS Poland Foundation in Warsaw, 13. the Central Clinical Hospital in Lodz, 14. the Central Clinical Hospital in Warsaw).

Figure 2: World Marrow Donor Association database and shares of specific countries in the worldwide hematopoietic stem cells donors pool.WMDA Search & Match Tool collect data from 57 different countries, but their shares are not equal.

Figure 3: Number of allogeneic transplantation performed in Poland in years 2006-2022 (A) and number of unrelated HSC donations from Polish donors performed for international (INT) and national (PL) patients (B) presented in the same scale.

Figure 4: Proportions of potential recipients without any potentially fully matched donor ABCDRDQ at low resolution level in WMDA (grey) and in Poland (black) over the years.

Figure 5: Changes in HSC transplantations performed using material from national (PL) and international donors (INT) in Poland from 2006 to 2022.

Figure 6: Numbers of total allogeneic transplantations (A) (together from related matched, haploidentical and unrelated donors) and transplantations from unrelated donors only (B) per 1 million inhabitants performed in different Polish regions (voivodeships) in 2006 and 2022.