A 65-year-old man from Rajkot, India was preparing for cardiac surgery when he encountered a surprising challenge. Despite having a known blood group of AB positive, which is universally accepted, he could not find blood that matched his blood type. This led to a long and difficult search for a solution.
The man’s struggle to find a blood match finally led to the discovery of India’s first ‘EMM negative’ blood case. This is an extremely rare condition, with only 11 such cases reported worldwide. The discovery was a significant breakthrough for the medical community in India, as it had previously been believed that all individuals with AB positive blood would have compatible blood transfusions.
The discovery of EMM negative blood means that the medical community in India must now consider this rare condition when treating patients who require blood transfusions. This is especially important for individuals with AB positive blood, as they may encounter difficulty in finding a blood match.
The case also highlights the importance of ongoing research and discovery in the medical field. Without the persistence and determination of the man and his medical team, the discovery of EMM negative blood may have taken much longer to occur. The discovery of this rare condition will enable medical professionals to better understand the complexities of blood transfusions and improve patient outcomes.

The Asian Journal of Transfusion Science has published a paper titled ‘Anti-Emm, a rare specificity for high-incidence antigen Emm in an Indian patient defining a new blood group system EMM (ISBT042)’, which was authored by Ripal Shah, Snehal Senjalia, Sanmukh Joshi, and others. The paper discusses the discovery of a new blood group system, EMM, which was identified in an Indian patient who required blood transfusion for coronary artery bypass grafting surgery.
According to Dr. Ripple Shah, the director of the first blood bank in Ahmedabad, the patient had initially gone to a blood bank in Rajkot to find a match for their AB positive blood type but was unable to find a compatible donor. The patient’s blood was found to have antibodies that were reacting to saline and antiglobulin phases, indicating a rare specificity for the high-incidence antigen Emm. Additionally, the blood of the patient’s children did not match hers, which further complicated the search for a compatible blood donor.
This discovery has significant implications for the medical community, as it highlights the need to consider the possibility of rare blood group systems when treating patients who require blood transfusions. The identification of the EMM blood group system will enable medical professionals to better understand the complexities of blood transfusions and improve patient outcomes.
After the patient in Ahmedabad was unable to find a compatible blood donor for their AB positive blood type, their blood samples were sent to Surat for advanced analysis and then to a facility in the US. The results of the analysis showed that the blood lacked the EMM phenotype, which is present in almost all human red blood cells.
This rare blood condition made it difficult to find a compatible blood match for the patient, as it occurred naturally and was not the result of bleeding or other medical conditions. The patient’s brother had a similar blood type, but not the same, which would have made it difficult to use his blood in an emergency.
Unfortunately, the patient died of other health complications before a suitable blood match could be found. However, the discovery of this rare blood condition has significant implications for the medical community and highlights the importance of ongoing research and discovery in the field of transfusion medicine.
The absence of the EMM phenotype in the patient’s blood underscores the need for medical professionals to consider the possibility of rare blood group systems when treating patients who require blood transfusions. Additionally, the discovery of this rare blood condition highlights the importance of continued research and collaboration between medical professionals in India and around the world.
The discovery of the rare EMM-negative blood condition in an Indian patient who required a blood transfusion was a significant breakthrough for the medical community. The patient’s blood was found to lack the EMM phenotype, which is present in almost all human red blood cells. This discovery was instrumental in identifying EMM as a new blood group system, which was named ISBT042.
The discovery of a new blood group system is a significant achievement in the field of transfusion medicine. It underscores the importance of ongoing research and discovery in the medical field and highlights the potential for new discoveries to improve patient outcomes. The identification of the EMM blood group system will enable medical professionals to better understand the complexities of blood transfusions and improve patient care.
Frequently Asked Questions
What is the EMM blood group system?
The EMM blood group system is a rare blood group system that was discovered in an Indian patient who required a blood transfusion for coronary artery bypass grafting surgery. It is named ISBT042.
What is the significance of the discovery of the EMM blood group system?
The discovery of the EMM blood group system is significant because it highlights the importance of ongoing research and discovery in the field of transfusion medicine and underscores the potential for new discoveries to improve patient outcomes.
How was the EMM blood group system discovered?
The EMM blood group system was discovered after a patient in Rajkot, India required a blood transfusion for coronary artery bypass grafting surgery and was unable to find a compatible blood match. The patient’s blood was found to lack the EMM phenotype, which led to the identification of the new blood group system.
How rare is the EMM blood group system?
The EMM blood group system is extremely rare, with only 11 cases reported worldwide.
What challenges does the EMM blood group system present for blood transfusions?
The absence of the EMM phenotype in a patient’s blood makes it difficult to find a compatible blood match, which can complicate the process of blood transfusions.
What is the significance of the discovery of the EMM blood group system in India?
The discovery of the EMM blood group system in India is particularly significant because it highlights the need for medical professionals to consider the possibility of rare blood group systems when treating patients who require blood transfusions.
What are some potential implications of the discovery of the EMM blood group system?
The discovery of the EMM blood group system has the potential to improve patient outcomes by enabling medical professionals to better understand the complexities of blood transfusions and develop new approaches to transfusion medicine.
How is the EMM blood group system identified?
The EMM blood group system is identified through advanced analysis of blood samples, which can reveal the absence of the EMM phenotype.
What are some challenges associated with identifying rare blood group systems?
Identifying rare blood group systems can be challenging due to the rarity of these conditions and the difficulty in finding compatible blood matches for patients who require transfusions.
What is the future of research on blood group systems?
Research on blood group systems is ongoing and will continue to be an important area of focus for the medical community, as new discoveries in this field have the potential to improve patient outcomes and advance the field of transfusion medicine.
Conclusion
The discovery of the EMM blood group system in an Indian patient who required a blood transfusion for coronary artery bypass grafting surgery is a significant breakthrough in the field of transfusion medicine. This rare blood condition, which is absent in almost all human red blood cells, makes it difficult to find a compatible blood match and underscores the need for medical professionals to consider the possibility of rare blood group systems when treating patients who require blood transfusions.
The identification of the EMM blood group system as a new blood group system, named ISBT042, highlights the importance of ongoing research and discovery in the medical field. The discovery of new blood group systems can improve patient outcomes and provide medical professionals with the tools they need to develop new approaches to transfusion medicine.
The rarity of the EMM blood group system underscores the challenges associated with identifying rare blood group systems. Advanced analysis of blood samples is necessary to identify these conditions, which can be time-consuming and difficult to access.
Despite these challenges, the discovery of the EMM blood group system has significant implications for the medical community. The identification of rare blood group systems such as EMM underscores the importance of ongoing research and discovery in the field of transfusion medicine and underscores the potential for new discoveries to improve patient outcomes.