An unusual cytoplasmic ribosomal structure in pathologic lymphocytes.

Blood slides of a 70-yr-old woman branes around a central “core.” The with lymphosarcoma cell leukemia ribosomal nature of this structure is showed 10#{176}/o-40#{176}/o notched-split nuevidenced by: (1) similarity of the parcleated lymphocytes. A few round, tides ot ribosomes, (2) the structure’s nucleated lymphocytes contained a connections with endoplasmic reticuround or oval body close to the nulum, and (3) the ribonuclease effect on cleus. The electron microscopic counthe corresponding paranuclear bodies terpart 9f this body was a complex in the blood slides. As an Incidental tubular structure described previously finding, a very few round nucleated by D. Zucker-Franklin. The walls of lymphocytes showed nuclear blebs this structure are composed of granonly. ules on concentric layers of mem-