(Campbell and Baruch, 1960;Leigh, Abbott, Rogers, and Gay, 1954), and paraoesophageal collaterals (Jonsson and Rian, 1970) have also been reported.We have reviewed 304 consecutive splenic venograms performed for suspected portal hypertension. Oesophageal collaterals had been filled on 145 occasions. In seven of these patients a plain chest radiograph shows a lower posterior mediastinal mass, which corresponds to dilated portosystemic collaterals on the splenic venogram. These seven patients form the subject of this report. Other patients with large oesophageal or paraoesophageal collaterals have been excluded when no mass is seen on the plain radiograph, either because the veins overlie the vertebral column in the anterior projection, or because they cannot be distinguished from the shadow of the descending aorta or the mediastinal pleural reflection.
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