Disorders of Lymphocytes

A collection of flashcards covering key vocabulary related to lymphocyte disorders, their causes, symptoms, and associated clinical conditions.

Lymphocytopenia

A condition defined as a decrease in lymphocytes, typically less than 3.0 × 10 9/L in adults.

Lymphocytosis

An increase in the number of lymphocytes in the blood, commonly associated with various infections or malignancies.

Epstein-Barr virus (EBV)

A ubiquitous human herpes DNA virus responsible for infectious mononucleosis.

AIDS

Acquired Immunodeficiency Syndrome, caused by HIV, leading to a weakened immune system.

Infectious mononucleosis

An acute, self-limiting lymphoproliferative condition often caused by EBV.

Toxoplasma gondii

The microorganism responsible for toxoplasmosis, which resembles infectious mononucleosis.

Bordetella pertussis

The bacterium that causes whooping cough, characterized by inflammation of the respiratory tract.

Cytomegalovirus (CMV)

A member of the herpes virus family causing various clinical syndromes, particularly in immunocompromised patients.

Neutrophilia

An increase in neutrophil count, often a nonspecific response to infection or inflammation.

Splenomegaly

Enlargement of the spleen, which can occur in infectious mononucleosis.

Lymphocytic leukemia

A type of cancer characterized by an excessive number of lymphocytes.

DiGeorge’s syndrome

A congenital disorder involving T-cell and B-cell defects.

Antibody testing

Laboratory testing used to diagnose conditions such as infectious mononucleosis and HIV.