What is Red Blood Cell Rouleaux?

What is Red Blood Cell Rouleaux?

• A. Blood clots
• B. Platelet aggregation
• C. Red Blood Cell Stacking
• D. WBC clumping

Answer: (C)

Red Blood Cell Rouleaux is the stacking of red blood cells in loose, coin-like columns rather than clumping together. This happens when plasma proteins such as fibrinogen or immunoglobulins are elevated, which reduces the negative surface charge that normally keeps red cells apart. With less repulsion, the cells line up in stacks, a pattern often seen on a smear or in low-flow blood samples and is related to an increased erythrocyte sedimentation rate. It’s not blood clots, platelet aggregation, or white blood cell clumping, which involve different cells and mechanisms. The described stacking of red cells best fits Rouleaux formation.

Red Blood Cell Rouleaux is the stacking of red blood cells in loose, coin-like columns rather than clumping together. This happens when plasma proteins such as fibrinogen or immunoglobulins are elevated, which reduces the negative surface charge that normally keeps red cells apart. With less repulsion, the cells line up in stacks, a pattern often seen on a smear or in low-flow blood samples and is related to an increased erythrocyte sedimentation rate. It’s not blood clots, platelet aggregation, or white blood cell clumping, which involve different cells and mechanisms. The described stacking of red cells best fits Rouleaux formation.