The diseases classified under the heading of malignant lymphoma have in common erratic proliferation of lymphoid tissue and an inevitably fatal outcome. Yet, within the group, and even within any of its subgroups, there occur wide variations in the rapidity and extent of lymphoid involvement of the various organs and in the survival time after onset of the first symptoms. In some instances, the clinical course is so protracted as to warrant the wishful nomenclature of “benign lymphoma.” The following case qualifies for the latter category. G. S., white married female, born in 1909, had measles, chicken-pox, and diphtheria in childhood, but no other diseases other than occasional bouts of influenza with tonsillitis; she was neither particularly robust nor sickly. Her present illness dated back to 1946, when a “blackhead” on the left side of the neck started to grow, turned purple, and reached the size of a thumb before it was labeled “sebaceous cyst” and excised; the incision healed after six weeks of open...