Medically reviewed by Benjamin Leach, MD Key Takeaways Lymphocytes are white blood cells that help protect the body from ...

Dear Dr. Roach: I am a female and almost 75 years old. My vital signs are always normal, and I am active, but slightly overweight. I get quarterly blood draws, and every reading is in the normal range ...

Lymphocytes are types of white blood cells important for fighting off infection and destroying cancer cells inside your body. There are three types of lymphocytes: Do you know the best thing about ...

Lymphocytosis occurs when a person has too many lymphocytes, a type of white blood cell. Symptoms include swollen lymph nodes. It can indicate an underlying health problem, such as an infection, ...

Chronic lymphocytic leukemia (CLL) affects cells that become lymphocytes. Monitoring the number of lymphocytes in the blood is important for many aspects of this form of cancer. A healthy adult ...

High neutrophils and low lymphocytes can mean your body is under severe stress or fighting an infection. A neutrophil-to-lymphocyte ratio (NLR) shows how sick you are and what treatment you may need.