Lymphocytes: Origin, Structure, and Interrelationships 



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Fig. 1-12. Blood film from leukemic reticuloendotheliosis. Note 

 mitotic figure. In triangular extensions of cytoplasm extruding up 

 and to the left of each aster are circular masses of the endoplasmic 

 portion of the cytoplasm. Note various morphologic types of reticular 

 cells in the surrounding field, (x 800) 



Fig. 1-13. Lymph node imprint from patient with lymphoblastic 

 lymphoma. Note lymphoblasts. many of which retain some nuclear 

 characteristics <>l reticular cells. The blood and marrow were negative 

 at the time <>i this biopsy, but the character of lymphoblasts indicated 

 that diffuse leukemic involvement would occur. (X 800) 



