A hematologic examination is the microscopic examination of the cells of the blood or blood-forming tissues (especially bone marrow), looking for changes in the structure of and/or numbers of various types of blood cells, including immature cells.

A hematologic examination is the microscopic examination of the cells of the blood or blood-forming tissues (especially bone marrow), looking for changes in the structure of and/or numbers of various types of blood cells, including immature cells.