Recently we1 reported an unusual case of Sporothrix invasion of the breast of a woman, with rather striking therapeutic results. The case which we are recording here is of sufficient rarity to warrant a detailed anamnestic, clinical and pathologic survey. We have been unable to find any other reported examples of cutaneous involvement with the Mucor type of fungus and believe this to be a pioneer case, although not all the European literature was available.
G. B., an unmarried white youth aged 17, was first seen by one of us (J. L. W.) in the office March 31, 1939. He complained of a "boil" on the right cheek of two weeks' duration. This had appeared first as a small red papule about the size of a pinhead. It had not been painful, it had slowly grown larger, and there had been some exudation of serum from the surface of