The following case shows this disease in its most advanced stage. It is extracted from the fifth volume of the London Medical Journal, and is intituled, “An Account of the Fatal Effects produced by attempting to remove a Ganglion by Seton.” It was drawn up by Mr. W. Dease, surgeon in Dublin. “In July 1781, a clergyman, aged thirty-seven, consulted me about a moveable ganglion, of the size of a small nutmeg, situated between the fore-finger and thumb of his right hand, near the wrist. He was eager to have it removed, and had been advised, for this purpose, to have a seton passed through it, as the best and most certain method; but, as he was apparently a robust healthy man, and the ganglion was attended with no pain, I advised him to consider it as a matter of no consequence, and not to meddle with it. Four months after this I was desired to visit him, and found him in a melancholy situation. A seton had been passed through the ganglion, and the consequences were, that the back of his hand had inflamed violently, that the ganglion had rapidly and amazingly increased, and that the openings made by the seton were filled with an ill-conditioned fungus, which sprung up as fast as it was removed, and was attended with frequent hemorrhage, and much pain. In consultation, it was agreed to remove this fungus by a free incision, which was done, and the metacarpal bones appeared bare and rough. Another opening was made through the thenar, and a seton passed through it, in order more effectually to prevent the growth of fungus. The bark was administered in large quantities, an opiate was given at night, and due attention was paid to the regimen of the patient. This method seemed to promise the most happy event. The fungus appeared to be entirely destroyed, a laudable suppuration took place, the swelling of the hand subsided, and the sores in a short time were so contracted as to indicate their speedy cicatrization. These favourable appearances, however, were not of long continuance; for, after some time, the fungus began gradually to rise again, and any mode of keeping it down, either by caustic, cutting, or pressure, seemed to produce no permanent good effect, as it increased rapidly, and at length degenerated into the most frightful cancerous fungus I have ever seen. Every local application that has been recommended in similar cases was tried in this, but without success; and internal remedies proved equally inefficacious. He took, for a considerable length of time, two ounces of bark in substance, in the course of twenty-four hours, so that he took, in the whole, twenty-eight pounds of that medicine. The extract of hemlock had also a fair trial, but produced no apparent effect.