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[61] [42] This is due to a therapeutic immune reaction of the grafted donor T lymphocytes against the diseased bone marrow of the recipient. This lower rate of relapse accounts for the increased success rate of allogeneic transplants, compared to transplants from identical twins, and indicates that allogeneic HSCT is a form of immunotherapy.
If you have a hundred patients and you give them a treatment applicable to all 100, and two are alive after 10 years, that is a 2% absolute survival rate. If you have 100 patients and you have a treatment applicable to 20 of the 100, and 20% of those 20 are alive after 10 years, that's only a 4% absolute survival rate, not a 20% survival rate.
Median survival rates can be quite misleading, especially for the relatively small sample that is available for these organs. Survival rates improve almost yearly, due to improved techniques and medications. This example is from the United Network of Organ Sharing (UNOS), the USA umbrella organization for transplant centers.
Around ten years after Virchow's findings, pathologist Franz Ernst Christian Neumann found that the bone marrow of a deceased person with leukemia was colored "dirty green-yellow" as opposed to the normal red. This finding allowed Neumann to conclude that a bone marrow problem was responsible for the abnormal blood of people with leukemia. [88]
With AMML being difficult to fully treat, the five-year survival rate is about 38-72% which typically decrease to 35-60% if there's no bone marrow transplantation performed. [11] Generally older patients over 60 have a poor outlook due to prior health status before the diagnosis and the aggressive chemotherapy regimen used. [13]
Overall, the five-year survival rate is higher than 75% among recipients of bone marrow transplantation. [39] Older people (who are generally too frail to undergo bone marrow transplants) and people who are unable to find a good bone marrow match have five-year survival rates of up to 35% when undergoing immune suppression. [40] Relapses are ...
In addition, as bone marrow transplantation is frequently used to treat cancer, mainly leukemias, donor T-cells have proven to have a valuable graft-versus-tumor effect. [24] A great deal of current research on allogeneic bone marrow transplantation involves attempts to separate the undesirable graft-vs-host disease aspects of T-cell physiology ...
The 5-year event free survival, disease-free survival, and overall survival rate in the phase 3 clinical study in DS-AMKL were 79, 89, 84 percent, respectively. [13] Other studies that use a treatment regimen similar to that used in the phase 3 clinical study report overall survival rates of ~80% [ 7 ] and long-term survivals of 74-91%. [ 9 ]