Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Peripheral blood lymphocytes
Introduction
Peripheral Blood Lymphocytes (PBL) are mature lymphocytes that circulate in the blood, rather than localizing to organs (such as the spleen or lymph nodes). They comprise T cells, NK cells and B cells.