Certain tumours, such as fibromata and sarcomata, occasionally undergo partial ossification, and this explanation probably applies to the following case, which is otherwise unique:


A man, sixty-two years of age, had long suffered from pain after food and other symptoms of indigestion, which developed at irregular intervals and terminated in an attack of diarrhoea. About five months before his death an attack had come on which proved unusually severe. One morning, when in fairly good health, he was seized with violent pain in the epigastrium, accompanied by vomiting, thirst, constipation, and a quick pulse. In the evening the epigastric region was found to be distended and very tender. The vomiting continued urgent, and death ensued about twenty-two hours after the commencement of the pain. At the autopsy the stomach was found to be considerably dilated. Close to the pylorus there was an osseous cartilaginous tumour the size and shape of a quart-bottle cork, which was firmly attached by one extremity to the wall of the stomach, while the other projected into the pyloric orifice like a stopper. The mucous membrane over the whole stomach was much inflamed.- Webster, 'London Medical and Physical Journal,' 1827, 2 N. S., p. 433.

(7) Aneurysms are sometimes met with in the coronary and splenic arteries, but they are seldom larger than a cherry and more often about the size of a pea. They are also apt to develop upon the base of a chronic simple ulcer, where their rupture is followed by fatal haematemesis (Powell, Sachs, Welch, Easmussen). Cavernous angiomata and lymphangiomata are also occasionally encountered.