PMN stands for which term in lab reporting?

• A. Polymorphonuclear
• B. Primary Mononuclear Neutrophils
• C. Peripheral Mononuclear Neutrophils
• D. Polymorphonuclear Neuron

Answer: (A)

PMN in lab reports refers to polymorphonuclear neutrophils, the neutrophil white blood cells. The term “polymorphonuclear” describes their lobed nucleus, and neutrophils are the most abundant WBCs, driving the body’s first-line defense against bacterial infections. In a differential count, PMNs are the neutrophil component of the leukocytes, contrasted with mononuclear cells like lymphocytes and monocytes. The other options don’t reflect standard terminology: neutrophils are not mononuclear, and a neuron is a brain cell, not a blood cell.