Huhn D, Thiel E, Rodt H
Klin Wochenschr. 1975 Apr 1;53(7):317-20. doi: 10.1007/BF01469058.
Cristalloid inclusions were demonstrated in the perinuclear space and the ergastoplasm of cells of chronic lymphocytic leukemia. These inclusions and the immunoglobulins of the cell membrane consisted of IgG. The leukemic cells were able to synthesize, but not to secrete, monoclonal immunoglobulins.