CD 10 Calla test is performed on a sample of blood to measure the level of CD 10 (Calla) in the blood. It is performed to confirm Common Acute Lymphoblastic Leukemia and also during the treatment and after the treatment of the same. CD10 is normally present on the surface of early lymphoid cells as well as on a number of other types of normal cells, such as especially cells in the kidney. IHC involves the process of selectively imaging antigens in cells of a tissue section and is used in the diagnosis of abnormal cells such as those found in cancerous tumors.