Case XXI (3).—History.
—M. C., Italian, aged 17, was admitted to the Cook County Hospital, May 20, 1907, to the service of Dr. Goodkind, with the following history: His illness began five months ago with the appearance on the anterior surface of the middle of the right thigh of an abscess which ruptured and discharged a thick, fetid, dark-brown pus. A papillomatous crust formed subsequently at the site of the abscess. There was at the same time a small abscess near this which healed in a few days. Two months later a sharp stabbing pain occurred in the right knee. Motion soon became restricted and in two weeks a swelling of the joint appeared. This gradually increased so that in two months the knee was twice its normal size. It remained in this condition until the time of his admission to the hospital. One month after the