64 



The Lymphocyte and Lymphocytic Tissue 



14 



\ ' ; ? 



k 



Fig. 4-12. Unidentified agranulocyte. This "lymphocyte-monocyte intergrade" cannot 

 be certainly identified as either cell type. The large mitochondria suggest, a lymphocyte, 

 but the speckled cytoplasm containing numerous profiles of endoplasmic reticulum 

 resembles monocytic cytoplasm. The nucleus is noncommittal with some tendency for 

 the dense nucleoplasm to collect under the nuclear membrane. But nucleoplasmic 

 differentiation does not show clearly, and the cell may be immature. (X 6000) 



Fig. 4-13. Lymphoblast: normal human blood. The nearly even density of the 

 nucleoplasm indicates immaturity. Compare with the mature lymphocyte in Fig. 4-10 

 and the leukemic lymphoblast in Fig. 4-15. (x 6000) 



Fig. 4-14. Lymphoblasts; normal human blood. The even density of the nucleoplasm 

 suggests that these cells are even younger than the cell in Fig. 4-13. Compare also with 

 Fig. 4-10 and 4-15. (X 6000) 



Fig. 1-1"). Lymphoblast; lymphatic leukemia. The even density of the nucleoplasm 

 and the extremely lucid cytoplasm are both characteristic of lymphoblasts. In the 

 lymphocytic series the early blastic forms tend to be noticeably less dense in both 

 nucleus and cytoplasm than mature cells. Compare with Figs. 4-10, 4-13, and 4-14. 

 (X 6500) 



