The recent medical literature contains many reports dealing with the unusual manifestations1 of that disease which is characterized by progressive enlargement of the fixed lymphatic tissue and a fatal termination. It has no doubt occurred to most clinicians who are interested in this subject that the unusual manifestations are being reported without any definite idea as to what comprises the usual. For this reason, we feel that the information derived from the study of 150 consecutive cases in the University Hospital might be worth recording. The data obtained in our study will be presented in tabular form, and the discussion of obvious facts will be avoided. No generally accepted terminology for the conditions under consideration exists. One finds clinical classifications and classifications based on pathologic histology as well as attempts to combine the two. Etiology remains a matter of opinion,2 and pathologic concepts are often almost lost in a maze