Benign Hemosiderosis. Presented by Dr. F. R. Menagh. Dr. James R. Rogin: I should like to take this opportunity to point out that the diagnosis "benign hemosiderosis" is representative of one of the most confused groupings in dermatological nomenclature. Let us examine the various entities in this group, as well as their formidable, confusing, and, in many instances, entirely meaningless names. First, there is Schamberg's disease, or "a peculiar progressive pigmentary dermatosis." Is it true that the disorder is really "peculiar" in that it can be differentiated completely from the other disorders in this group? I believe that it can not be so distinguished. The next word in the title, "progressive," is also meaningless, since all the other disorders in this group are also "progressive." The word "pigmentary" gives no clue that the pigment is of hemosiderin origin as contrasted to melanin or other types of pigment