Shown here is a lymphocyte that is larger with more abundant basophilic cytoplasm than the previous two lymphocytes. It is a young lymphocyte. These cells are sometimes seen even in normal blood and are nonspecific for any one disorder. Lymphocytes are increased in number in many diseases, especially certain acute and chronic infections, lymphocytic leukemia, and lymphoma. Abnormal lymphocytes, atypical lymphocytes, Sezary cells, leukemic lymphocytes, B-lymphocytes, T-lymphocytes, and null lymphocytes will be described in the programs, Immature Cells in the Granulocytic, Monocytic, and Lymphocytic Series and Lymphocytic Leukemia: Acute and Chronic.
Course Section: 03. Blood Smears Stained with Wright's Stain
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