For a number of years I have made note in my case books of the appearances presented by the tongue in dermatologic, syphilitic and other cases, and have been impressed with the relative frequency with which this organ is involved in one way or another.
At times the tongue lesion has no connection with or bearing upon the skin affection under treatment, while at others, and habitually in syphilis, it has important bearings. The subject is so large I must content myself with generalities and general conclusions.
The statistics I present cover several series of observations made at intervals covering a period of ten years. Thirty-nine hundred tongues were examined with the object above mentioned.
The importance of diagnosis in affections of the tongue need not be dwelt upon in addressing men who are constantly seeing the ravages produced in neglected cases of syphilis, tuberculosis and leucophakia going on to