Clinical and laboratory profile of anti-M

Area of Science:

• Immunohematology
• Transfusion Medicine

Background:

• Naturally occurring Anti-M antibodies are frequently detected in various clinical settings and among blood donors.
• Understanding the clinical significance and laboratory behavior of Anti-M is crucial for safe transfusion practices.

Purpose of the Study:

• To describe the clinical and laboratory findings of 11 cases where Anti-M was detected.
• To highlight the potential clinical significance and serologic challenges posed by Anti-M.

Main Methods:

• Retrospective review of immunohematology laboratory records.
• Analysis of donor and patient data over a 28-month period (September 2014 to December 2016).

Main Results:

• Eleven instances of Anti-M detection were identified.
• Cases included patients, a whole blood donor, a hematopoietic stem cell donor, and an external quality assessment sample.
• Anti-M can manifest as ABO group discrepancies or incompatible crossmatches.

Conclusions:

• Anti-M antibodies can be detected across diverse clinical scenarios, including in donors and patients.
• Clinical significance varies, and Anti-M can present laboratory challenges.
• Management strategies depend on antibody characteristics and the specific clinical context.