Enterogenous cyst of the mediastinum.

Enterogenous cyst of the mediastinum is not a common condition. According to Bickford (1949) 40 cases have been reported. Of these, 24 were lined by purely gastric mucosa (this includes the case reported by him), four had purely intestinal epithelium and 12 were composite. This paper is presented as a further instance of an enterogenous cyst which was removed successfully at thoracotomy. Case Hitory The patient was a baby girl born of a healthy mother who had had a normal pregnancy. The baby was admitted when aged 3 months, on March 1, 1950, because of bronchitis, which had been present for one week. Examination revealed cyanosis and distressed respirations, with diminished expansion of the chest over the right base, and a diminished percussion note. A diagnosis of bronchopneumonia was made. Mantoux tests were negative. Radiographs (Figs. I and 2) showed a large oval tumour lying posteriorly in the upper two-thirds of the right side of the chest. From time to time some stridor was noted. Her weight gain was not satisfactory. Mr. F. Ronald Edwards advised thoracotomy for a