Although not common, sarcoma of the kidney is by no means rare in early life, and in the not remote past the condition has been looked upon as hopelessly fatal. With the development of modern operative methods, however, not only has surgery become bolder, but its results are also more promising of success. In this healthful impulse, given to a progressive art, the surgery of the kidney has shared, and there are now on record a small number of cases in which successful operations have been performed for the relief of sarcoma of the kidney. The mortality of the operation is necessarily high, probably 38 to 40 per cent., and, although the number of recoveries is not large, still it would seem that when the growth has not formed too extensive adhesions or invaded adjacent organs or is unattended with metastasis, the alternative of operation should, at least, be offered,